Error 10007 installing latest Sequoia guest on Tahoe host

App & System Services Core OS
smadsen_om OP
Created Jun ’26
Replies 3
Boosts 0
Views 334
Participants 4

Filed a feedback on this: FB23038153

I am unable to install a new Sequoia 15.6.1 (latest available .ipsw) on a Tahoe 26.5.1 host using a Virtualization.framework-based VM app. I’ve tried both Tart and VirtualBuddy. Both get to 90% of the installation, then fail with this error:

Error Domain=VZErrorDomain Code=10007 "Installation failed." UserInfo={NSLocalizedFailure=An error occurred during installation., NSLocalizedFailureReason=Installation failed., NSUnderlyingError=0xc2ac2e280 {Error Domain=com.apple.MobileDevice.MobileRestore Code=-1 "AMRestorePerformRestoreModeRestoreWithError failed with error: 11" UserInfo={NSLocalizedDescription=AMRestorePerformRestoreModeRestoreWithError failed with error: 11, NSLocalizedFailureReason=An unknown error occurred during installation.}}}

I have tried re-installing MobileDevice.pkg from both Xcode 27 beta 1 and Xcode 26.5.0. I’ve rebooted my Mac. I get the same result each time.

I’ve also tried using an older Sequoia restore image (15.4.1), same result. Installing a Tahoe guest works fine.

Answered by DTS Engineer in 897318022
I’m going to research this and get back to you

This came up during the WWDC26 forums Q&A, and I’ve been posting updates about it to this thread.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Replies  3
Boosts  0
Views  334
Participants  4
DTS Engineer OP
Apple
Jun ’26
Filed a feedback on this: FB23038153

Thanks.

Our current thinking is that installing Xcode 27 beta installed a version of MobileDevice that broke compatibility with earlier releases. Unfortunately it’s hard to revert that. So I’m not sure what the best path forward is here. I’m going to research this and get back to you, possibly next week after the WWDC dust has settle a bit.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
trodemaster OP
4d

This appears to still be an issue with Xcode 27 Beta 3 device support. I had to boot into recovery and remove the installed files. After re-installing the support files from Xcode 26.6 I was able to install macOS VMs via VZ again for 26.6 and lower.

DTS Engineer OP
Apple
3d
Recommended
I’m going to research this and get back to you

This came up during the WWDC26 forums Q&A, and I’ve been posting updates about it to this thread.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Error 10007 installing latest Sequoia guest on Tahoe host
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