On macOS, creating a generic Mach bootstrap sandbox extension is currently failing. We can temporarily disable creating this sandbox extension on macOS.
<rdar://problem/104607120>
Pull request: https://github.com/WebKit/WebKit/pull/9052
Committed 259313@main (7e8a23f0c35a): <https://commits.webkit.org/259313@main> Reviewed commits have been landed. Closing PR #9052 and removing active labels.