How to get Conda and Virtualenv to work on mac OS Catalina?

Question

I previously had Conda running smoothly on Mojave, but I\'ve found that the upgrade to Catalina moves the \"anaconda3\" folder to your Desktop > Relocated Items > Security >

Answer 1

This is what worked for me.

These are my header files (Catalina 10.15):

/Library/Developer/CommandLineTools/usr/include/c++/v1/stdio.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include/sys/stdio.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include/stdio.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/sys/stdio.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/sys/stdio.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/stdio.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/sys/stdio.h

Run sudo find /Library -name stdio.h to see where yours are located.

Mojave 10.14 header files:

$ sudo find /Library -name stdio.h 
/Library/Developer/CommandLineTools/usr/include/c++/v1/stdio.h
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/stdio.h
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdio.h
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/sys/stdio.h

As can be seen the SDKs are now split into MACOSX10.14 and 10.15 unlike in Mojave.

TLDR

So, these were my SDK folders on Catalina:

1. Rename MacOSX.sdk to MacOSX_orig.sdk
2. Right click on MacOSX10.14.sdk
3. Duplicate
4. Rename duplicate folder to MacOSX.sdk

Your folder structure should now look like this:

Like this we are basically using the previous version's OSX sdk as sysroot. Hope this helps.