MacOS Golden Gate 27 Beta Won’t Install in a Virtual Machine? It’s a Known Issue

Running MacOS Beta versions within a virtual machine is generally a fantastic way to test out system software without having to fully commit to running the beta as the primary operating system. But sometimes even trying to get the VM setup fails. In this case, trying to install macOS Golden Gate 27 beta in a virtual machine may result in failure, error messages, or boot failures, preventing MacOS 27 beta from installing or running in the VM.

For example, attempting to install MacOS Golden Gate 27 beta into a virtualization app with a restore IPSW file may result in an error message that says the following: “An error occurred during installation. Installation failed.”

The screenshot here shows this error in UTM, but you might see the same or similar errors in other virtualization apps, including virtualbuddy, tart, Parallels, Vmware, and others too.

Early testing of MacOS Golden Gate beta has suggested there’s a compatibility issue with virtualization environments, making the installation impossible in many cases, if not difficult. If you’re experiencing this issue, it is frustrating, but know that you certainly aren’t alone.

MacOS Golden Gate 27 Beta Virtualization Problems are a Known Issue

There are various user reports scattered around the web discussing this problem, where it’s a known issue for Parallels, Vmware, VirtualBuddy, UTM, tart, virtualOS, and even on Apple’s developer forums, where an Apple engineer posted the following acknowledging the issue and offering a workaround:

“A macOS 27 guest should run on a macOS 26.6 host, but we discovered a late incompatibility between the VZMacOSInstaller API on macOS 26.6 and the macOS 27 IPSW.

Unfortunately the best workaround I can think of at the moment is creating a VM on a macOS 27 host and then moving it back to your macOS 26.6 host. I understand this is not ideal. I’ll see if we can find a better workaround for you.”

An Apple engineer stating they discovered an incompatibility between MacOS Tahoe and MacOS Golden Gate beta IPSW means that Apple is aware of the problem. That’s great news, because a fix is likely on the way.

Workarounds to get MacOS 27 Beta running in a VM on Tahoe

As outlined by the Apple engineer above, one solution is to create a MacOS Golden Gate 27 beta VM on another Mac running MacOS Golden Gate beta already as its primary system software, and then copy that Golden Gate VM to MacOS Tahoe 26.6, where it should boot as expected.

Another workaround is to create a MacOS Tahoe VM, boot into that, sign into your Apple ID and enroll in the beta program, and then upgrade directly to MacOS Golden Gate 27 beta through the standard Software Update mechanism inside the VM.

MacOS Golden Gate 27 Beta VM Issues Will Likely Get Fixed Soon

Since this is a known issue, and an Apple engineer is directly addressing it within Apple’s Developer Forums, you can bet that a fix will likely arrive relatively soon. Perhaps the fix with come with a new Golden Gate beta release, or updates to MacOS Tahoe, or updates to Mobile Device Support and/or Xcode, or all of the above.

While this can be frustrating, it’s also not completely unheard of. This is not the first time that users have reported problems with virtualizing new beta MacOS versions, as some of you may recall there were similar issues with MacOS Tahoe VMs after its beta debuted. But, at the moment anyway, the solutions that worked for Tahoe beta do not always work for Golden Gate beta. Curiously, some users have reported success with installing a Golden Gate VM into Tahoe after getting the latest Xcode beta onto a Mac running the latest Tahoe beta, but it’s not consistent enough to offer that as a solution.

Presumably an update will arrive in the near future that addresses this issue, so have a little patience. Given how common it is for developers and pro users to rely on virtual machines for testing software, this will likely get resolved fairly quickly.

So, if you find that MacOS Golden Gate 27 beta won’t run in a VM, or won’t even install, now you know why. If you used these workarounds to success, or have found another consistent approach to addressing this issue, or maybe you have found another way to consistently and reliably install MacOS Golden Gate 27 beta into a virtual machine running on MacOS Tahoe or MacOS Sequoia, share it with us in the comments!