fix macos portability issues (third batch) #9936

Job	Run time
validate commits	14s
python linting	32s
Generate build matrix	12s
spelling	6s
bookworm - test-install	12m 18s
bookworm - 32 bit	13m 44s
noble - test-install	12m 59s
el9 - test-install	13m 15s
alpine - test-install	12m 6s
fedora40 - test-install	12m 17s
jammy - test-install	12m 10s
focal - py3.8	18m 8s
bookworm - gcc-12,content-s3,distcheck	19m 46s
fedora40 - clang-18	16m 59s
coverage	23m 49s
el8 - ascii	19m 35s
el8 - test-install	13m 24s
el8 - system,coverage	7m 57s
inception	23m 20s
flux-sched check	6m 56s
flux-pam check	4m 8s
flux-pmix check	13m 54s
flux-accounting check	4m 45s
Generate docker manifest	1s
	4h 22m 35s

Provide feedback