Install the MacOS iGMT version too.

[joa-quim]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.76%. Comparing base (2e92f2f) to head (9008855).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/iGMT_install.jl	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2047   +/-   ##
=======================================
  Coverage   80.75%   80.76%           
=======================================
  Files         200      203    +3     
  Lines       31781    31785    +4     
=======================================
+ Hits        25666    25672    +6     
+ Misses       6115     6113    -2     

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