macos

Fixup method_defined? usage #466

Job	Run time
ruby-versions / Generate Ruby versions	2s
macos-13 2.7	57s
macos-13 3.0	27s
macos-13 3.1	22s
macos-13 3.2	18s
macos-13 3.3	22s
macos-13 3.4	19s
macos-13 debug	26s
macos-13 head	22s
macos-14 2.7	28s
macos-14 3.0	55s
macos-14 3.1	16s
macos-14 3.2	45s
macos-14 3.3	14s
macos-14 3.4	14s
macos-14 debug	20s
macos-14 head	16s
	7m 3s

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