MacOS

remove removed external memory and semaphore extensions #338

Job	Run time
macos-gcc (9, ON, Xcode, 11)	10m 13s
macos-gcc (9, ON, Xcode, 17)	8m 54s
macos-gcc (9, ON, Ninja Multi-Config, 11)	7m 12s
macos-gcc (9, ON, Ninja Multi-Config, 17)	5m 31s
macos-gcc (9, OFF, Xcode, 11)	9m 20s
macos-gcc (9, OFF, Xcode, 17)	8m 35s
macos-gcc (9, OFF, Ninja Multi-Config, 11)	7m 25s
macos-gcc (9, OFF, Ninja Multi-Config, 17)	5m 14s
macos-gcc (11, ON, Xcode, 11)	8m 18s
macos-gcc (11, ON, Xcode, 17)	8m 12s
macos-gcc (11, ON, Ninja Multi-Config, 11)	5m 52s
macos-gcc (11, ON, Ninja Multi-Config, 17)	5m 53s
macos-gcc (11, OFF, Xcode, 11)	8m 10s
macos-gcc (11, OFF, Xcode, 17)	9m 12s
macos-gcc (11, OFF, Ninja Multi-Config, 11)	5m 45s
macos-gcc (11, OFF, Ninja Multi-Config, 17)	5m 42s
	1h 59m 28s

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