Install fails on Mac M1 due to missing dependency on Proj

[dham]

Thetis will fail to install on Mac M1. The reason for this is that there are no wheels available on M1 for pyproj see pyproj4/pyproj#1064 .

Pip can build pyproj from source, but this depends on the user having Proj itself installed. This can be achieved with:

brew install proj 

Consequently, Thetis currently has an undocumented dependency on that Homebrew package on M1.

[tkarna]

OK thanks, good to know.

[snowman2]

If you have time to try out these wheels, that would be very helpful: pyproj4/pyproj#1064 (comment)

Please upvote the comment if you have a positive experience and comment in pyproj4/pyproj#1064 if you get an opportunity to try it out and run into any issues.