Bug fixes for Mac OSX landing in 2.107.1

[Mike Shah]

On Monday, 26 February 2024 at 12:55:32 UTC, Iain Buclaw wrote:
> Hi,
>
> Over the last 2-3 years, there's been a slow build-up of issues 
> on MacOS that have now come home to roost, and they could no 
> longer be ignored/worked arounded in CI as GHA has made Xcode 
> 15.0.1 the default SDK since ~end of January/February 2024.
>
> [...]

This is great Ian! The unaligned pointers and macosx development 
issue have plagued students for a long time (the workarounds were 
possible but confusing). Will give it a try after March 1st