Given that MacOS complications were the source of the delay last time CircleCI was unable to produce an updated Xcode image - does the jump from MacOS 15.5 to 15.6 have something to do with the delay here?
Would CircleCI be willing to consider pursuing MacOS updates separately from Xcode, with an eye towards being as up-to-date as possible? This would allow MacOS related complications to be identified as soon as possible, rather than having them impact CircleCI users who have a reasonable expectation of being able to use recent Xcode releases in CI builds.