docs: update info on XCode requirements (#34097)

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Valentin Volkl 2022-11-24 00:20:09 +01:00 committed by GitHub
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@ -21,8 +21,9 @@ be present on the machine where Spack is run:
:header-rows: 1
These requirements can be easily installed on most modern Linux systems;
on macOS, XCode is required. Spack is designed to run on HPC
platforms like Cray. Not all packages should be expected
on macOS, the Command Line Tools package is required, and a full XCode suite
may be necessary for some packages such as Qt and apple-gl. Spack is designed
to run on HPC platforms like Cray. Not all packages should be expected
to work on all platforms.
A build matrix showing which packages are working on which systems is shown below.