Mac OS X 10.5 compiler fixes #2565

Job	Run time
Check for Max SDK	1s
linux-x64-internal-release	11m 57s
macos-x64-internal-release	13m 34s
macos-x64-internal-debug	14m 29s
macos-x64-external-release	18m 21s
linux-x64-internal-debug	10m 39s
linux-x64-external-release	12m 31s
maxplugin-${{ matrix.cfg.str }}-${{ matrix.cfg.sdk-version }}	0s
windows-x86-internal-release	16m 5s
windows-x86-internal-debug	13m 22s
windows-x86-external-release	16m 53s
windows-x64-internal-release	12m 47s
windows-x64-internal-debug	18m 42s
windows-x64-external-release	16m 57s
	2h 56m 18s

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