Update README.md

Author: marius10p

README.md

@@ -89,8 +89,8 @@ If you are using a GPU, make sure its drivers and the cuda libraries are correct
 2. Open an anaconda prompt / command prompt which has `conda` for **python 3** in the path
 3. Create a new environment with `conda create --name cellpose python=3.8`. We recommend python 3.8, but python 3.9 and 3.10 will likely work as well.
 4. To activate this new environment, run `conda activate cellpose`
-5. To install the minimal version of cellpose, run `python -m pip install cellpose`.  
-6. To install cellpose and the GUI, run `python -m pip install cellpose[gui]`. If you're on a zsh server, you may need to use ' ' around the cellpose[gui] call: `python -m pip install 'cellpose[gui]'`.
+5. (option 1) To install cellpose with the GUI, run `python -m pip install cellpose[gui]`.  If you're on a zsh server, you may need to use ' ': `python -m pip install 'cellpose[gui]'`.
+6. (option 2) To install cellpose without the GUI, run `python -m pip install cellpose`. 
 
 To upgrade cellpose (package [here](https://pypi.org/project/cellpose/)), run the following in the environment: