[jdk11u-dev] RFR: 8369226: GHA: Switch to MacOS 15 [v3]

[Severin Gehwolf]

On Fri, 14 Nov 2025 08:57:34 GMT, Antonio Vieiro <avieiro at openjdk.org> wrote:

>> Backport of [JDK-8369226](https://bugs.openjdk.org/browse/JDK-8369226) from JDK17 that upgrades `macos-13` runners to `macos-15-intel`, and XCode from `14.3.1` to `16.4`, since `macos-13` will be removed in early december.
>> 
>> The backport is not clean, as there are many differences between GHA in JDK11 and upper versions (e.g.
>> [JDK-8341097](https://bugs.openjdk.org/browse/JDK-8341097), [JDK-8325194](https://bugs.openjdk.org/browse/JDK-8325194)).
>
> Antonio Vieiro has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8336451: [11u] GHA macos-13 and macos-15 builders are unable to resolve local hostname

Please move [JDK-8336451](https://bugs.openjdk.org/browse/JDK-8336451) to a separate PR. AFAIK, we see it in current GHA as well (occasionally) and it's not nice to bundle an initial fix (of a bug) with another unless they are actually related. In this case it's better to separate it out since we'd have a better trace which fixes what. Thanks!

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PR Comment: https://git.openjdk.org/jdk11u-dev/pull/3117#issuecomment-3533628815