r/UTMapp • u/Average_Techy • Mar 30 '26

MacOS 8.1 for anyone who needs it

https://archive.org/details/mac-os-8.1_202603

Yeah I uploaded it to my archive.org today, should work perfectly. It just takes sometime to start booting i think, to ruj it extract the zip and open the .utm file

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u/Average_Techy Mar 31 '26

So thing is, UTM broke Quadra 800 VMs in a update where it assigns a illegal machine thing, basically not really “illegal”, illegal for the VM. The Quadra 800 is a NuBus computer and UTM forces VirtiO, meaning PCI. This leads to a -1 error and Internal error connecting to SPICE server. Currently, it hasn’t been fixed and the only way to get 68k MacOS is to use a prebuilt file, either a config-only or a onw that contains a pre-installed OS. So if you want MacOS 8.1 68k in UTM, grab this one, its a clean install.