Improve error message for when a MacOS target version is not met #183

Job	Run time
pre-commit	10s
mypy	17s
tests	4m 58s
isolated_tests (macos-11, 12.4, 3.x)	2m 34s
isolated_tests (macos-11, 13.0, 3.x)	2m 49s
isolated_tests (macos-12, 14.0, 3.x)	1m 50s
isolated_tests (macos-13, 14.2, 3.x)	2m 8s
isolated_tests (ubuntu-latest, 3.7)	28s
isolated_tests (ubuntu-latest, 3.8)	22s
isolated_tests (ubuntu-latest, 3.9)	23s
isolated_tests (ubuntu-latest, 3.10)	31s
isolated_tests (ubuntu-latest, 3.11)	15s
isolated_tests (windows-latest, 3.x)	48s
	17m 33s

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