diff --git a/rEFIt_UEFI/Platform/kext_inject.c b/rEFIt_UEFI/Platform/kext_inject.c
index 5b6b808272..81e94cbcbf 100644
--- a/rEFIt_UEFI/Platform/kext_inject.c
+++ b/rEFIt_UEFI/Platform/kext_inject.c
@@ -576,147 +576,6 @@ EFI_STATUS LoadKexts(IN LOADER_ENTRY *Entry)
 }
 
 
-/*
- * Adler32 from Chameleon
- */
-#define BASE 65521L /* largest prime smaller than 65536 */
-#define NMAX 5000
-// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1
-
-#define DO1(buf,i)  {s1 += buf[i]; s2 += s1;}
-#define DO2(buf,i)  DO1(buf,i); DO1(buf,i+1);
-#define DO4(buf,i)  DO2(buf,i); DO2(buf,i+2);
-#define DO8(buf,i)  DO4(buf,i); DO4(buf,i+4);
-#define DO16(buf)   DO8(buf,0); DO8(buf,8);
-
-static unsigned long Adler32(unsigned char *buf, long len)
-{
-  unsigned long s1 = 1; // adler & 0xffff;
-  unsigned long s2 = 0; // (adler >> 16) & 0xffff;
-  unsigned long result;
-  int k;
-
-  while (len > 0) {
-    k = len < NMAX ? len : NMAX;
-    len -= k;
-    while (k >= 16) {
-      DO16(buf);
-      buf += 16;
-      k -= 16;
-    }
-    if (k != 0) do {
-      s1 += *buf++;
-      s2 += s1;
-    } while (--k);
-    s1 %= BASE;
-    s2 %= BASE;
-  }
-  result = (s2 << 16) | s1;
-  // result is in big endian
-  return result;
-}
-
-typedef struct {
-  UINT32  Magic;
-  UINT32  Signature;
-  UINT32  Length;
-  UINT32  Adler32;
-  UINT32  Version;
-  UINT32  NumKexts;
-  UINT32  CpuType;
-  UINT32  CpuSubtype;
-} MKextHeader;
-
-typedef struct {
-  UINT32  PlistOffset;
-  UINT32  PlistCompressedSize;
-  UINT32  PlistFullSize;
-  UINT32  PlistModifiedSeconds;
-  UINT32  BinaryOffset;
-  UINT32  BinaryCompressedSize;
-  UINT32  BinaryFullSize;
-  UINT32  BinaryModifiedSeconds;
-} MKextFile;
-
-#define MKEXT_MAGIC     0x54584b4d
-#define MKEXT_SIGNATURE 0x58534f4d
-#define MKEXT_VERSION_1 0x00800001
-
-int is_mkext_v1(LOADER_ENTRY *Entry, UINT8* drvPtr) {
-  _DeviceTreeBuffer *dtb = (_DeviceTreeBuffer*) (((UINT8*)drvPtr) + sizeof(DeviceTreeNodeProperty));
-  MKextHeader* mkext_ptr = (MKextHeader*)(UINTN)(dtb->paddr);
-
-  if (mkext_ptr->Magic == MKEXT_MAGIC
-   && mkext_ptr->Signature == MKEXT_SIGNATURE
-   && mkext_ptr->Version == MKEXT_VERSION_1) {
-    DBG_RT(Entry, "MKext_v1 found at paddr=0x%08x, length=0x%08x\n", dtb->paddr, dtb->length);
-    return 1;
-  }
-  return 0;
-}
-
-void patch_mkext_v1(LOADER_ENTRY *Entry, UINT8 *drvPtr) {
-  _DeviceTreeBuffer *dtb = (_DeviceTreeBuffer*) (((UINT8*)drvPtr) + sizeof(DeviceTreeNodeProperty));
-  MKextHeader* mkext_ptr = (MKextHeader*)(UINTN)dtb->paddr;
-
-  UINT32 mkext_len      = SwapBytes32(mkext_ptr->Length);
-  UINT32 mkext_numKexts = SwapBytes32(mkext_ptr->NumKexts);
-
-  LIST_ENTRY    *Link;
-  KEXT_ENTRY    *KextEntry;
-  if(!IsListEmpty(&gKextList)) {
-    for (Link = gKextList.ForwardLink; Link != &gKextList; Link = Link->ForwardLink) {
-      KextEntry = CR(Link, KEXT_ENTRY, Link, KEXT_SIGNATURE);
-      MKextFile *mkext_insert = (MKextFile*)((UINT8*)mkext_ptr + sizeof(MKextHeader) + mkext_numKexts * sizeof(MKextFile));
-
-      // free some space
-      CopyMem((UINT8*)mkext_insert + sizeof(MKextFile),
-              (UINT8*)mkext_insert,
-              mkext_len - (sizeof(MKextHeader) + mkext_numKexts * sizeof(MKextFile)));
-      mkext_len += sizeof(MKextFile);
-
-      // update the offsets to reflect 0x20 bytes moved above
-      for (UINT32 i = 0; i < mkext_numKexts; i++) {
-        MKextFile *kext_base = (MKextFile*)((UINT8*)mkext_ptr + sizeof(MKextHeader) + i * sizeof(MKextFile));
-        UINT32 plist_offset  = SwapBytes32(kext_base->PlistOffset)  + sizeof(MKextFile);
-        UINT32 binary_offset = SwapBytes32(kext_base->BinaryOffset) + sizeof(MKextFile);
-        kext_base->PlistOffset  = SwapBytes32(plist_offset);
-        kext_base->BinaryOffset = SwapBytes32(binary_offset);
-      }
-
-      // copy kext data (plist+binary)
-      CopyMem((UINT8*)mkext_ptr + mkext_len,
-              (UINT8*)(KextEntry->kext.paddr + sizeof(_BooterKextFileInfo)),
-              (UINT32)((_BooterKextFileInfo*)(UINTN)(KextEntry->kext.paddr))->infoDictLength
-               + (UINT32)((_BooterKextFileInfo*)(UINTN)(KextEntry->kext.paddr))->executableLength);
-
-      // insert kext offsets
-      mkext_insert->PlistOffset           = SwapBytes32(mkext_len);
-      mkext_len += ((_BooterKextFileInfo*)(UINTN)(KextEntry->kext.paddr))->infoDictLength;
-      mkext_insert->PlistCompressedSize   = 0;
-      mkext_insert->PlistFullSize         = SwapBytes32((UINT32)((_BooterKextFileInfo*)(UINTN)(KextEntry->kext.paddr))->infoDictLength);
-      mkext_insert->PlistModifiedSeconds  = 0;
-      mkext_insert->BinaryOffset          = SwapBytes32(mkext_len);
-      mkext_len += ((_BooterKextFileInfo*)(UINTN)(KextEntry->kext.paddr))->executableLength;
-      mkext_insert->BinaryCompressedSize  = 0;
-      mkext_insert->BinaryFullSize        = SwapBytes32((UINT32)((_BooterKextFileInfo*)(UINTN)(KextEntry->kext.paddr))->executableLength);
-      mkext_insert->BinaryModifiedSeconds = 0;
-      mkext_numKexts ++;
-
-      // update the header
-      mkext_ptr->Length   = SwapBytes32(mkext_len);
-      mkext_ptr->NumKexts = SwapBytes32(mkext_numKexts);
-
-      // update the checksum
-      mkext_ptr->Adler32 = SwapBytes32(Adler32((UINT8*)mkext_ptr + 0x10, mkext_len - 0x10));
-
-      // update the memory-map reference
-      dtb->length = mkext_len;
-    }
-  }
-}
-
-
 ////////////////////
 // OnExitBootServices
 ////////////////////
@@ -802,17 +661,6 @@ EFI_STATUS InjectKexts(/*IN EFI_MEMORY_DESCRIPTOR *Desc*/ IN UINT32 deviceTreeP,
     return EFI_INVALID_PARAMETER;
   }
 
-
-  UINT64 os_version = AsciiOSVersionToUint64(Entry->OSVersion);
-  if (os_version < AsciiOSVersionToUint64("10.6")) {
-    DBG_RT(Entry, "no kernel patch for Tiger/Leopard; try to patch mkext\n");
-    if (is_mkext_v1(Entry, drvPtr)) {
-      patch_mkext_v1(Entry, drvPtr);
-      return EFI_SUCCESS;
-    }
-  }
-
-
   // make space for memory map entries
   platformEntry->NumProperties -= 2;
   offset = sizeof(DeviceTreeNodeProperty) + ((DeviceTreeNodeProperty*) infoPtr)->Length;