Can't install macOS 26.1

[ChasBelov]

When I try to install 26.1.0 I get an error that it's the wrong file type.

Steps:

1. Launch virtualOS
2. Click Install (+)
3. Choose Download latest version

Expected and actual result: macOS 26.1.0 downloads

macOS 26.1.0 (Build 25B78)
Downloading 19% (2688 of 17851 MB)

4. When download is done, click Done
5. Click Install (+)
6. In Restore Image dialog, select Restorelmage_1.ipsw

Select Restore Image
Restorelmage_1.ipsw
Restorelmage.ipsw
macOS 26.1.0 (Build 25B78)

7. Click Install

Expected result: macOS 26.1.0 installs
Actual result: Get virtualOS error dialog:

Error
The restore image is invalid. The restore image is the wrong file type.

Sorry I can't provide actual screenprints. Github is not letting me upload them.

[ChasBelov]

Note: Restorelmage.ipsw is macOS 15.5.0 (Build 24F74) but I don't want to install that one. Eventually, I can't upgrade due to the virtual disk running out of space, even though I allowed 60 GB.

[yep]

Thanks for bringing this issue to my attention. Here's a preview build of the fix, using TestFlight:
https://testflight.apple.com/join/vWKNYgmM

[yep]

Version 2.3.1 is in review and should be available soon, you can also download the binary from GitHub Releases

[ChasBelov]

Thank you. Actually, the TestFlight link is to the 2.2 version. I'll patiently await the post to the App Store.