[Fix] MacOS build when xcode is not installed #574

Job	Run time
docs	1m 54s
opam_dune_build (ubuntu-22.04, 4.12.x)	3m 4s
bytecode_build (ubuntu-22.04, 4.14.x)	1m 31s
opam_dune_build (macos-14, 4.14.x)	5m 12s
build_compat (4.14.x, true, -ubuntu-x86_64)	7m 10s
build (macos-14, 5.2.0)	7m 15s
build_compat (ocaml-variants.4.14.2+options,ocaml-option-musl,ocaml-option-static,ocaml-option-fl...	2m 11s
build (macos-14, 4.14.2, true, -macos-arm64)	7m 57s
build_compat (4.12.x)	4m 45s
build (macos-12, 4.14.2, true, -macos-x86_64)	13m 45s
build_compat (4.08.x)	4m 54s
build (ubuntu-22.04, 5.2.0)	6m 26s
build (ubuntu-22.04, 4.14.2)	6m 24s
build (ubuntu-20.04, 4.14.2)	5m 49s
build (windows-2022, 4.14.0+mingw64c, true, -windows-x86_64)	6m 55s
build (windows-2019, 4.14.0+mingw32c, true, -windows-i386)	6m 57s
rpc_abicheck (ubuntu-22.04, 5.2.x, v2.53.5)	1m 48s
rpc_abicheck (ubuntu-22.04, 4.14.x, v2.53.5)	2m 1s
rpc_abicheck (ubuntu-22.04, 4.14.x, v2.52.1, true)	1m 51s
rpc_abicheck (ubuntu-22.04, 4.14.x, v2.51.5, true)	2m 2s
rpc_abicheck (ubuntu-22.04, 4.08.x, v2.51.5, true)	2m 11s
rpc_abicheck (ubuntu-22.04, 4.08.x, v2.51.2, true)	1m 46s
rpc_abicheck (windows-2019, ocaml-variants.4.14.0+mingw64c, v2.53.5)	3m 59s
rpc_abicheck (windows-2019, ocaml-variants.4.14.0+mingw64c, v2.52.1, true)	3m 55s
rpc_abicheck (windows-2019, ocaml-variants.4.08.1+mingw32c, v2.51.5, true)	3m 51s
rpc_abicheck (macos-12, 4.14.x, v2.53.5)	4m 22s
rpc_abicheck (macos-12, 4.14.x, v2.52.1, true)	4m 20s
rpc_abicheck (macos-12, 4.08.x, v2.51.2, true)	4m 14s
	2h 8m 29s

Provide feedback