[jdk8u-dev] RFR: 8369226: GHA: Switch to MacOS 15

[Andrew John Hughes]

On Tue, 13 Jan 2026 14:59:50 GMT, Severin Gehwolf <sgehwolf at openjdk.org> wrote:

> > Yes, I looked at these bugs briefly a few days ago along with the fix on the PR you created. While I appreciate the merits of [openjdk/jdk8u at bacf306](https://github.com/openjdk/jdk8u/commit/bacf30605ae1b8eb21010aa8d96b3a21e73ecccf) in getting us further in the build, the final fix does need to be a backport of the JNF removals.
> 
> Let's please use the GHA work-around for now until we have all the backports in place to no longer need the JNF workaround. Right now we don't get Mac OS X builds in GHAs at all, which is bad and I'd like to avoid skipping testing on it for much longer before PRs land.

I was about to suggest the same thing :-) When I wrote my [initial comment on the JNF hack](https://github.com/openjdk/jdk8u-dev/pull/738#issuecomment-3739986723) I thought it was just a case of backports (though quite a few). After discovering the JNF code that is only in 8u - and the most complicated of all from what I can see - we should definitely have **something** running while we try to fix it properly.

If you and/or @zzambers can file a bug and PR for the workaround, I'm happy to review and approve it.  https://github.com/openjdk/jdk8u-dev/pull/742 can go in after this. The other JNF PR I will change to apply after a reversal of the workaround patch.

If anyone has any information on how to get a Mac VM setup to work on this - or indeed, want to work on [JDK-8375208](https://bugs.openjdk.org/browse/JDK-8375208)  themselves - it would be most welcome.

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PR Comment: https://git.openjdk.org/jdk8u-dev/pull/738#issuecomment-3787255213