diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3d70f28573554..a92ee34876712 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -440,16 +440,16 @@ set(SWIFT_DARWIN_STDLIB_INSTALL_NAME_DIR "/usr/lib/swift" CACHE STRING
 set(SWIFT_DARWIN_STDLIB_PRIVATE_INSTALL_NAME_DIR "@rpath" CACHE STRING
     "The directory of the install_name for the private standard library dylibs")
 
-set(SWIFT_DARWIN_DEPLOYMENT_VERSION_OSX "10.9" CACHE STRING
+set(SWIFT_DARWIN_DEPLOYMENT_VERSION_OSX "10.15" CACHE STRING
     "Minimum deployment target version for OS X")
 
-set(SWIFT_DARWIN_DEPLOYMENT_VERSION_IOS "7.0" CACHE STRING
+set(SWIFT_DARWIN_DEPLOYMENT_VERSION_IOS "13.0" CACHE STRING
     "Minimum deployment target version for iOS")
 
-set(SWIFT_DARWIN_DEPLOYMENT_VERSION_TVOS "9.0" CACHE STRING
+set(SWIFT_DARWIN_DEPLOYMENT_VERSION_TVOS "13.0" CACHE STRING
     "Minimum deployment target version for tvOS")
 
-set(SWIFT_DARWIN_DEPLOYMENT_VERSION_WATCHOS "2.0" CACHE STRING
+set(SWIFT_DARWIN_DEPLOYMENT_VERSION_WATCHOS "6.0" CACHE STRING
     "Minimum deployment target version for watchOS")
 
 #
diff --git a/test/ClangImporter/SceneKit_test.swift b/test/ClangImporter/SceneKit_test.swift
index 7347175ecc160..05dc38b52e6a0 100644
--- a/test/ClangImporter/SceneKit_test.swift
+++ b/test/ClangImporter/SceneKit_test.swift
@@ -134,7 +134,7 @@ func useRenamedValues() {
   let _ = SCNSceneSource.LoadingOption.createNormalsIfAbsent
   let _ = SCNSceneSource.LoadingOption.checkConsistency
   let _ = SCNSceneSource.LoadingOption.flattenScene
-  let _ = SCNSceneSource.LoadingOption.useSafeMode
+  let _ = SCNSceneSource.LoadingOption.useSafeMode // expected-warning {{'useSafeMode' was deprecated in macOS 10.13: No longer supported}}
   let _ = SCNSceneSource.LoadingOption.assetDirectoryURLs
   let _ = SCNSceneSource.LoadingOption.overrideAssetURLs
   let _ = SCNSceneSource.LoadingOption.strictConformance
@@ -183,8 +183,8 @@ func useRenamedAPIs(actionable: SCNActionable, action: SCNAction, data: Data,
   let _ = SCNAction.playAudio(audioSource, waitForCompletion: false)
 
   animatable.addAnimation(animation, forKey: "key")
-  let _ = animatable.isAnimationPaused(forKey: "key")
-  let _ = animatable.setAnimationSpeed(1.0, forKey: "key")
+  let _ = animatable.isAnimationPaused(forKey: "key") // expected-warning {{'isAnimationPaused(forKey:)' was deprecated in macOS 10.13: Use -[SCNAnimationPlayer paused] instead}}
+  let _ = animatable.setAnimationSpeed(1.0, forKey: "key") // expected-warning {{'setAnimationSpeed(_:forKey:)' was deprecated in macOS 10.13: Use -[SCNAnimationPlayer setSpeed:] instead}}
 
   let _ = lookAtConstraint.isGimbalLockEnabled
   let _ = SCNIKConstraint.inverseKinematicsConstraint(chainRootNode: node)
diff --git a/test/IRGen/availability.swift b/test/IRGen/availability.swift
index 42f48ee004a49..029f8a3403137 100644
--- a/test/IRGen/availability.swift
+++ b/test/IRGen/availability.swift
@@ -19,7 +19,7 @@ import Foundation
 // OPT: s10Foundation11MeasurementVySo17NSUnitTemperature
 
 public func dontHoist() {
-  if #available(OSX 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *) {
+  if #available(macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0, *) {
       let measurement = Measurement<UnitTemperature>(value: Double(42), unit: .celsius)
       print("\(measurement)")
   } else {
@@ -49,13 +49,13 @@ public func dontHoist() {
 // OPT-NOT: call {{.*}} @"$ss26_stdlib_isOSVersionAtLeastyBi1_Bw_BwBwtF"
 // OPT: ret void
 public func multipleAvailabilityChecks() {
-  if #available(OSX 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *) {
+  if #available(macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0, *) {
     print("test one")
   }
-  if #available(OSX 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *) {
+  if #available(macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0, *) {
     print("test two")
   }
-  if #available(OSX 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *) {
+  if #available(macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0, *) {
     print("test three")
   }
 }
diff --git a/test/PrintAsObjC/resilient-ancestry.swift b/test/PrintAsObjC/resilient-ancestry.swift
index 12bbfcdcc9a74..b577b745365bf 100644
--- a/test/PrintAsObjC/resilient-ancestry.swift
+++ b/test/PrintAsObjC/resilient-ancestry.swift
@@ -6,12 +6,13 @@
 
 // RUN: cp %S/Inputs/custom-modules/module.map %t/module.map
 
-// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck %s -module-name resilient -emit-objc-header-path %t/resilient.h -I %t -enable-library-evolution
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck %s -module-name resilient -emit-objc-header-path %t/resilient.h -I %t -enable-library-evolution -target %target-cpu-apple-macosx10.13
 // RUN: %FileCheck %s --check-prefix=NO-STUBS < %t/resilient.h
 // RUN: %check-in-clang %t/resilient.h -I %t
 
 // REQUIRES: objc_interop
 // UNSUPPORTED: OS=iosmac
+// REQUIRES: OS=macosx
 
 // See also resilient-ancestry.swift, for the stable ABI deployment target test.
 
diff --git a/test/Sema/availability_define.swift b/test/Sema/availability_define.swift
index 8e7d4eab454c3..73e839675e452 100644
--- a/test/Sema/availability_define.swift
+++ b/test/Sema/availability_define.swift
@@ -1,23 +1,23 @@
 // RUN: %target-typecheck-verify-swift \
-// RUN:   -define-availability "_iOS8Aligned:macOS 10.10, iOS 8.0" \
-// RUN:   -define-availability "_iOS9Aligned:macOS 10.11, iOS 9.0" \
-// RUN:   -define-availability "_iOS9:iOS 9.0" \
-// RUN:   -define-availability "_macOS10_11:macOS 10.11" \
-// RUN:   -define-availability "_myProject 1.0:macOS 10.11" \
-// RUN:   -define-availability "_myProject 2.5:macOS 10.12"
+// RUN:   -define-availability "_iOS13Aligned:macOS 10.15, iOS 13.0" \
+// RUN:   -define-availability "_iOS14Aligned:macOS 11.0, iOS 14.0" \
+// RUN:   -define-availability "_iOS14:iOS 14.0" \
+// RUN:   -define-availability "_macOS11_0:macOS 11.0" \
+// RUN:   -define-availability "_myProject 1.0:macOS 11.0" \
+// RUN:   -define-availability "_myProject 2.5:macOS 12.5"
 // REQUIRES: OS=macosx
 
-@available(_iOS8Aligned, *)
-public func onMacOS10_10() {}
+@available(_iOS13Aligned, *)
+public func onMacOS10_15() {}
 
-@available(_iOS9Aligned, *)
-public func onMacOS10_11() {}
+@available(_iOS14Aligned, *)
+public func onMacOS11_0() {}
 
-@available(_iOS9, _macOS10_11, tvOS 11.0, *)
+@available(_iOS14, _macOS11_0, tvOS 14.0, *)
 public func composed() {}
 
-@available(_iOS8Aligned, *)
-@available(macOS, deprecated: 10.10)
+@available(_iOS13Aligned, *)
+@available(macOS, deprecated: 10.15)
 public func onMacOSDeprecated() {}
 
 @available(_myProject, *) // expected-error {{expected declaration}}
@@ -42,25 +42,25 @@ public func brokenVersion() {}
 // expected-error @-1 {{expected 'available' option such as 'unavailable', 'introduced', 'deprecated', 'obsoleted', 'message', or 'renamed'}}
 public func unknownMacro() {}
 
-@available(_iOS9) // expected-error {{must handle potential future platforms with '*'}}
+@available(_iOS14) // expected-error {{must handle potential future platforms with '*'}}
 public func noOtherOSes() {}
 
-@available(_iOS8Aligned, *)
+@available(_iOS13Aligned, *)
 func client() {
-  onMacOS10_10()
-  onMacOS10_11() // expected-error {{is only available in macOS 10.11 or newer}}
+  onMacOS10_15()
+  onMacOS11_0() // expected-error {{is only available in macOS 11.0 or newer}}
   // expected-note @-1 {{add 'if #available' version check}}
-  onMacOSDeprecated()
+  onMacOSDeprecated() // expected-warning {{'onMacOSDeprecated()' was deprecated in macOS 10.15}}
 
-  if #available(_iOS9Aligned, *) {
-    onMacOS10_11()
+  if #available(_iOS14Aligned, *) {
+    onMacOS11_0()
   }
 
-  if #unavailable(_iOS9Aligned) {
-    onMacOS10_11() // expected-error {{is only available in macOS 10.11 or newer}}
+  if #unavailable(_iOS14Aligned) {
+    onMacOS11_0() // expected-error {{is only available in macOS 11.0 or newer}}
     // expected-note @-1 {{add 'if #available' version check}}
   } else {
-    onMacOS10_11()
+    onMacOS11_0()
   }
 
   if #available(_unknownMacro, *) { } // expected-error {{expected version number}}
@@ -72,39 +72,40 @@ public func doIt(_ closure: () -> ()) {
 
 @inlinable
 public func forbidMacrosInInlinableCode() {
-  if #available(_iOS9Aligned, *) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
-  if #available(_iOS9, _macOS10_11, *) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
-  if #available(iOS 9.0, _macOS10_11, tvOS 9.0, *) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
-  if #unavailable(_iOS9Aligned) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
-  if #unavailable(_iOS9, _macOS10_11) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
-  if #unavailable(iOS 9.0, _macOS10_11, tvOS 9.0) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
+  if #available(_iOS14Aligned, *) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
+  if #available(_iOS14, _macOS11_0, *) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
+  if #available(iOS 14.0, _macOS11_0, tvOS 14.0, *) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
+  if #unavailable(_iOS14Aligned) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
+  if #unavailable(_iOS14, _macOS11_0) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
+  if #unavailable(iOS 14.0, _macOS11_0, tvOS 14.0) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
   doIt {
-    if #available(_iOS9Aligned, *) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
+    if #available(_iOS14Aligned, *) { } // expected-error {{availability macro cannot be used in an '@inlinable' function}}
   }
 }
 
 @_alwaysEmitIntoClient
 public func forbidMacrosInInlinableCode1() {
-  if #available(_iOS9Aligned, *) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
-  if #available(_iOS9, _macOS10_11, *) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
-  if #available(iOS 9.0, _macOS10_11, tvOS 9.0, *) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
-  if #unavailable(_iOS9Aligned) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
-  if #unavailable(_iOS9, _macOS10_11) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
-  if #unavailable(iOS 9.0, _macOS10_11, tvOS 9.0) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
+  if #available(_iOS14Aligned, *) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
+  if #available(_iOS14, _macOS11_0, *) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
+  if #available(iOS 14.0, _macOS11_0, tvOS 14.0, *) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
+  if #unavailable(_iOS14Aligned) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
+  if #unavailable(_iOS14, _macOS11_0) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
+  if #unavailable(iOS 14.0, _macOS11_0, tvOS 14.0) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
   doIt {
-    if #available(_iOS9Aligned, *) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
+    if #available(_iOS14Aligned, *) { } // expected-error {{availability macro cannot be used in an '@_alwaysEmitIntoClient' function}}
   }
 }
 
-@_backDeploy(before: _iOS9Aligned)
+@available(_iOS13Aligned, *)
+@_backDeploy(before: _iOS14Aligned)
 public func forbidMacrosInInlinableCode2() {
-  if #available(_iOS9Aligned, *) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
-  if #available(_iOS9, _macOS10_11, *) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
-  if #available(iOS 9.0, _macOS10_11, tvOS 9.0, *) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
-  if #unavailable(_iOS9Aligned) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
-  if #unavailable(_iOS9, _macOS10_11) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
-  if #unavailable(iOS 9.0, _macOS10_11, tvOS 9.0) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
+  if #available(_iOS14Aligned, *) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
+  if #available(_iOS14, _macOS11_0, *) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
+  if #available(iOS 14.0, _macOS11_0, tvOS 14.0, *) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
+  if #unavailable(_iOS14Aligned) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
+  if #unavailable(_iOS14, _macOS11_0) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
+  if #unavailable(iOS 14.0, _macOS11_0, tvOS 14.0) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
   doIt {
-    if #available(_iOS9Aligned, *) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
+    if #available(_iOS14Aligned, *) { } // expected-error {{availability macro cannot be used in a '@_backDeploy' function}}
   }
 }
diff --git a/test/SymbolGraph/Symbols/Mixins/Availability/Basic.swift b/test/SymbolGraph/Symbols/Mixins/Availability/Basic.swift
index 7f7eb9eefc714..6e3e294b249b7 100644
--- a/test/SymbolGraph/Symbols/Mixins/Availability/Basic.swift
+++ b/test/SymbolGraph/Symbols/Mixins/Availability/Basic.swift
@@ -5,7 +5,7 @@
 
 // REQUIRES: OS=macosx
 
-@available(macOS, introduced: 10.9, deprecated: 10.10, obsoleted: 10.11, message: "Everyone makes mistakes", renamed: "S2")
+@available(macOS, introduced: 10.9, deprecated: 11.0, obsoleted: 18.1, message: "Everyone makes mistakes", renamed: "S2")
 public struct S {}
 
 // CHECK: "domain": "macOS"
@@ -15,12 +15,12 @@ public struct S {}
 // CHECK-NEXT: "minor": 9
 
 // CHECK: deprecated 
-// CHECK-NEXT: "major": 10
-// CHECK-NEXT: "minor": 10
+// CHECK-NEXT: "major": 11
+// CHECK-NEXT: "minor": 0
 
 // CHECK: obsoleted
-// CHECK-NEXT: "major": 10
-// CHECK-NEXT: "minor": 11
+// CHECK-NEXT: "major": 18
+// CHECK-NEXT: "minor": 1
 
 // CHECK: "message": "Everyone makes mistakes"
 // CHECK: "renamed": "S2"
diff --git a/test/SymbolGraph/Symbols/Mixins/Availability/Inherited/ObsoletedFilled.swift b/test/SymbolGraph/Symbols/Mixins/Availability/Inherited/ObsoletedFilled.swift
index d50718b4c34fe..295bad8b192f5 100644
--- a/test/SymbolGraph/Symbols/Mixins/Availability/Inherited/ObsoletedFilled.swift
+++ b/test/SymbolGraph/Symbols/Mixins/Availability/Inherited/ObsoletedFilled.swift
@@ -6,7 +6,7 @@
 
 // REQUIRES: OS=macosx
 
-@available(macOS, obsoleted: 10.15)
+@available(macOS, obsoleted: 11.0)
 public struct S {
   public func foo() {}
 }
@@ -16,13 +16,13 @@ public struct S {
 // CHECK-NEXT:   {
 // CHECK-NEXT:     "domain": "macOS",
 // CHECK-NEXT:     "obsoleted": {
-// CHECK-NEXT:       "major": 10,
-// CHECK-NEXT:       "minor": 15
+// CHECK-NEXT:       "major": 11,
+// CHECK-NEXT:       "minor": 0
 // CHECK-NEXT:     }
 // CHECK-NEXT:   }
 // CHECK-NEXT: ]
 
-@available(macOS, obsoleted: 10.15)
+@available(macOS, obsoleted: 11.0)
 public struct Outer {
   public struct Inner {
     // TRANSITIVE-LABEL: "precise": "s:16IntroducedFilled5OuterV5InnerV3fooyyF"
@@ -30,8 +30,8 @@ public struct Outer {
     // TRANSITIVE-NEXT:   {
     // TRANSITIVE-NEXT:     "domain": "macOS",
     // TRANSITIVE-NEXT:     "obsoleted": {
-    // TRANSITIVE-NEXT:       "major": 10,
-    // TRANSITIVE-NEXT:       "minor": 15
+    // TRANSITIVE-NEXT:       "major": 11,
+    // TRANSITIVE-NEXT:       "minor": 0
     // TRANSITIVE-NEXT:     }
     // TRANSITIVE-NEXT:   }
     // TRANSITIVE-NEXT: ]
diff --git a/test/SymbolGraph/Symbols/Mixins/Availability/Inherited/ObsoletedReplaced.swift b/test/SymbolGraph/Symbols/Mixins/Availability/Inherited/ObsoletedReplaced.swift
index 0674311d40c2f..c9f7c86039748 100644
--- a/test/SymbolGraph/Symbols/Mixins/Availability/Inherited/ObsoletedReplaced.swift
+++ b/test/SymbolGraph/Symbols/Mixins/Availability/Inherited/ObsoletedReplaced.swift
@@ -10,19 +10,19 @@
 
 // REQUIRES: OS=macosx
 
-@available(macOS, obsoleted: 10.14)
+@available(macOS, obsoleted: 18.14)
 public struct S {
   // LESSTHAN-LABEL: "precise": "s:17ObsoletedReplaced1SV8lessThanyyF",
   // LESSTHAN: "availability": [
   // LESSTHAN-NEXT:   {
   // LESSTHAN-NEXT:     "domain": "macOS",
   // LESSTHAN-NEXT:     "obsoleted": {
-  // LESSTHAN-NEXT:       "major": 10,
+  // LESSTHAN-NEXT:       "major": 18,
   // LESSTHAN-NEXT:       "minor": 10
   // LESSTHAN-NEXT:     }
   // LESSTHAN-NEXT:   }
   // LESSTHAN-NEXT: ]
-  @available(macOS, obsoleted: 10.10)
+  @available(macOS, obsoleted: 18.10)
   public func lessThan() {}
 
   // GREATERTHAN-LABEL: "precise": "s:17ObsoletedReplaced1SV11greaterThanyyF",
@@ -30,12 +30,12 @@ public struct S {
   // GREATERTHAN-NEXT:   {
   // GREATERTHAN-NEXT:     "domain": "macOS",
   // GREATERTHAN-NEXT:     "obsoleted": {
-  // GREATERTHAN-NEXT:       "major": 10,
+  // GREATERTHAN-NEXT:       "major": 18,
   // GREATERTHAN-NEXT:       "minor": 14
   // GREATERTHAN-NEXT:     }
   // GREATERTHAN-NEXT:   }
   // GREATERTHAN-NEXT: ]
-  @available(macOS, obsoleted: 10.15)
+  @available(macOS, obsoleted: 18.15)
   public func greaterThan() {}
 
   // EQUAL-LABEL: "precise": "s:17ObsoletedReplaced1SV5equalyyF",
@@ -43,16 +43,16 @@ public struct S {
   // EQUAL-NEXT:   {
   // EQUAL-NEXT:     "domain": "macOS",
   // EQUAL-NEXT:     "obsoleted": {
-  // EQUAL-NEXT:       "major": 10,
+  // EQUAL-NEXT:       "major": 18,
   // EQUAL-NEXT:       "minor": 14
   // EQUAL-NEXT:     }
   // EQUAL-NEXT:   }
   // EQUAL-NEXT: ]
-  @available(macOS, obsoleted: 10.14)
+  @available(macOS, obsoleted: 18.14)
   public func equal() {}
 }
 
-@available(macOS, obsoleted: 10.14)
+@available(macOS, obsoleted: 18.14)
 public struct Outer {
   public struct Inner {
     // TRANSITIVELESSTHAN-LABEL: "precise": "s:17ObsoletedReplaced5OuterV5InnerV8lessThanyyF"
@@ -60,12 +60,12 @@ public struct Outer {
     // TRANSITIVELESSTHAN-NEXT:   {
     // TRANSITIVELESSTHAN-NEXT:     "domain": "macOS",
     // TRANSITIVELESSTHAN-NEXT:     "obsoleted": {
-    // TRANSITIVELESSTHAN-NEXT:       "major": 10,
+    // TRANSITIVELESSTHAN-NEXT:       "major": 18,
     // TRANSITIVELESSTHAN-NEXT:       "minor": 10
     // TRANSITIVELESSTHAN-NEXT:     }
     // TRANSITIVELESSTHAN-NEXT:   }
     // TRANSITIVELESSTHAN-NEXT: ]
-    @available(macOS, obsoleted: 10.10)
+    @available(macOS, obsoleted: 18.10)
     public func lessThan() {}
 
     // TRANSITIVEGREATERTHAN-LABEL:"precise": "s:17ObsoletedReplaced5OuterV5InnerV11greaterThanyyF"
@@ -73,12 +73,12 @@ public struct Outer {
     // TRANSITIVEGREATERTHAN-NEXT:   {
     // TRANSITIVEGREATERTHAN-NEXT:     "domain": "macOS",
     // TRANSITIVEGREATERTHAN-NEXT:     "obsoleted": {
-    // TRANSITIVEGREATERTHAN-NEXT:       "major": 10,
+    // TRANSITIVEGREATERTHAN-NEXT:       "major": 18,
     // TRANSITIVEGREATERTHAN-NEXT:       "minor": 14
     // TRANSITIVEGREATERTHAN-NEXT:     }
     // TRANSITIVEGREATERTHAN-NEXT:   }
     // TRANSITIVEGREATERTHAN-NEXT: ]
-    @available(macOS, obsoleted: 10.15)
+    @available(macOS, obsoleted: 18.15)
     public func greaterThan() {}
 
     // TRANSITIVEEQUAL-LABEL:"precise": "s:17ObsoletedReplaced5OuterV5InnerV5equalyyF"
@@ -86,12 +86,12 @@ public struct Outer {
     // TRANSITIVEEQUAL-NEXT:   {
     // TRANSITIVEEQUAL-NEXT:     "domain": "macOS",
     // TRANSITIVEEQUAL-NEXT:     "obsoleted": {
-    // TRANSITIVEEQUAL-NEXT:       "major": 10,
+    // TRANSITIVEEQUAL-NEXT:       "major": 18,
     // TRANSITIVEEQUAL-NEXT:       "minor": 14
     // TRANSITIVEEQUAL-NEXT:     }
     // TRANSITIVEEQUAL-NEXT:   }
     // TRANSITIVEEQUAL-NEXT: ]
-    @available(macOS, obsoleted: 10.14)
+    @available(macOS, obsoleted: 18.14)
     public func equal() {}
   }
 }
diff --git a/test/attr/attr_objc_resilience.swift b/test/attr/attr_objc_resilience.swift
index 0afd4cefa6acd..17459fd041b46 100644
--- a/test/attr/attr_objc_resilience.swift
+++ b/test/attr/attr_objc_resilience.swift
@@ -1,9 +1,10 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -emit-module-path %t/resilient_struct.swiftmodule %S/../Inputs/resilient_struct.swift -enable-library-evolution
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-module-path %t/resilient_objc_class.swiftmodule %S/../Inputs/resilient_objc_class.swift -I %t -enable-library-evolution
-// RUN: %target-swift-frontend -typecheck -verify %s -I %t
+// RUN: %target-swift-frontend -typecheck -verify %s -I %t -target %target-cpu-apple-macosx10.13
 
 // REQUIRES: objc_interop
+// REQUIRES: OS=macosx
 
 import Foundation
 import resilient_objc_class
@@ -46,19 +47,19 @@ extension AnotherFixedLayoutNSObjectSubclass {
 // If either the class or the extension member has sufficiently narrow
 // availability, we're okay.
 extension AnotherResilientNSObjectSubclass {
-  @available(macOS 10.15, iOS 13.0.0, tvOS 13.0.0, watchOS 6.0.0, *)
+  @available(macOS 11, iOS 14.0.0, tvOS 14.0.0, watchOS 7.0.0, *)
   @objc public func availableCategoryOneMethod() {}
 }
 
 extension AnotherResilientNSObjectSubclass {
-  @available(macOS 10.15, iOS 13.0.0, tvOS 13.0.0, watchOS 6.0.0, *)
+  @available(macOS 11, iOS 14.0.0, tvOS 14.0.0, watchOS 7.0.0, *)
   @objc public func availableCategoryTwoMethod() {}
 }
 
-@available(macOS 10.15, iOS 13.0.0, tvOS 13.0.0, watchOS 6.0.0, *)
+@available(macOS 11, iOS 14.0.0, tvOS 14.0.0, watchOS 7.0.0, *)
 @objc public class AvailableResilientNSObjectSubclass : ResilientNSObjectOutsideParent {}
 
-@available(macOS 10.15, iOS 13.0.0, tvOS 13.0.0, watchOS 6.0.0, *)
+@available(macOS 11, iOS 14.0.0, tvOS 14.0.0, watchOS 7.0.0, *)
 extension AnotherResilientNSObjectSubclass {
   @objc public func categoryThreeMethod() {}
 }
diff --git a/test/stdlib/Foundation_NewGenericAPIs.swift b/test/stdlib/Foundation_NewGenericAPIs.swift
index dc17c38cb944f..6c24f5082efda 100644
--- a/test/stdlib/Foundation_NewGenericAPIs.swift
+++ b/test/stdlib/Foundation_NewGenericAPIs.swift
@@ -41,7 +41,7 @@ func test_NSCoder_decodeTopLevelObjectOfClasses_forKey_error(
 
 
 func test_NSKeyedUnarchiver_unarchiveObjectWithData(_ data: NSData) {
-  var r = NSKeyedUnarchiver.unarchiveObject(with: data as Data)
+  var r = NSKeyedUnarchiver.unarchiveObject(with: data as Data) // expected-warning{{deprecated}}
   expectType(Optional<Any>.self, &r)
 }
 
diff --git a/utils/build-script-impl b/utils/build-script-impl
index 870cb5fb999cf..c958c7c2a9dc2 100755
--- a/utils/build-script-impl
+++ b/utils/build-script-impl
@@ -94,10 +94,10 @@ KNOWN_SETTINGS=(
 
     ## Darwin Options
     darwin-crash-reporter-client                  ""                "whether to enable CrashReporter integration, default is 1 on Darwin platforms, 0 otherwise"
-    darwin-deployment-version-ios                 "7.0"             "minimum deployment target version for iOS"
-    darwin-deployment-version-osx                 "10.9"            "minimum deployment target version for OS X"
-    darwin-deployment-version-tvos                "9.0"             "minimum deployment target version for tvOS"
-    darwin-deployment-version-watchos             "2.0"             "minimum deployment target version for watchOS"
+    darwin-deployment-version-ios                 "13.0"            "minimum deployment target version for iOS"
+    darwin-deployment-version-osx                 "10.15"           "minimum deployment target version for OS X"
+    darwin-deployment-version-tvos                "13.0"            "minimum deployment target version for tvOS"
+    darwin-deployment-version-watchos             "6.0"             "minimum deployment target version for watchOS"
     darwin-install-extract-symbols                ""                "whether to extract symbols with dsymutil during installations"
     darwin-install-extract-symbols-use-just-built-dsymutil "1"       "whether we should extract symbols using the just built dsymutil"
     darwin-symroot-path-filters                   ""                "space-separated list of path patterns to consider for symbol generation"
diff --git a/utils/build_swift/build_swift/defaults.py b/utils/build_swift/build_swift/defaults.py
index 4f56d6749ae07..ff0674886b8a2 100644
--- a/utils/build_swift/build_swift/defaults.py
+++ b/utils/build_swift/build_swift/defaults.py
@@ -51,10 +51,10 @@
 SWIFT_ANALYZE_CODE_COVERAGE = 'false'
 
 DARWIN_XCRUN_TOOLCHAIN = 'default'
-DARWIN_DEPLOYMENT_VERSION_OSX = '10.9'
-DARWIN_DEPLOYMENT_VERSION_IOS = '7.0'
-DARWIN_DEPLOYMENT_VERSION_TVOS = '9.0'
-DARWIN_DEPLOYMENT_VERSION_WATCHOS = '2.0'
+DARWIN_DEPLOYMENT_VERSION_OSX = '10.15'
+DARWIN_DEPLOYMENT_VERSION_IOS = '13.0'
+DARWIN_DEPLOYMENT_VERSION_TVOS = '13.0'
+DARWIN_DEPLOYMENT_VERSION_WATCHOS = '6.0'
 
 UNIX_INSTALL_PREFIX = '/usr'
 DARWIN_INSTALL_PREFIX = ('/Applications/Xcode.app/Contents/Developer/'