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I'm following the instructions in this article, "Installing Snow Leopard in VMware Fusion", to create a Snow Leopard virtual machine.

I downloaded the ISO from https://archive.org/details/snow-leopard-install_202112.

I used EFI Unlocker to create the two ROM files per the above instructions. I copied the ROM files to the "Snow Leopard" VMBundle, and while it was open I added the needed lines to the .VMX file.

But when I reopen Fusion and start the VM to begin setup from the ISO an error message soon appears:  "Could not open EFI64-MACOS.ROM (No such file or directory)" . Actually that error appears twice, then setup closes. 

Any suggestions about how to overcome this?

user428697
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  • What is your host machine? VirtualBox will allow Snow Leopard installations without having to do the modifications given in your linked article. – David Anderson Mar 08 '23 at 23:56
  • mid-2012 MacBook Pro, i7. "Wow!" about VirtualBox. I'll give it a try if it can coexist with Fusion. This problem with Snow Leopard was a surprise because I was able to create VMs for most if not all of the MacOS's since Mtn. Lion on this MBP. (so I can support people with different versions) Thanks for the tip! – user428697 Mar 09 '23 at 04:22
  • VirtualBox can coexist with Fusion Player. I have both installed on a 2013 iMac running Catalina (with 16 GB of memory). I used the Snow Leopard ISO from this answer. – David Anderson Mar 09 '23 at 04:28
  • Suggest you read https://forums.macrumors.com/threads/installing-snow-leopard-and-rosetta-into-parallels-7-in-lion.1365439/ It is primarily about SL in Parallels, but the thread contains instructions (some by me) regarding similar method for SL in Fusion. 2) Can you get hold of SL Server?
    • – Gilby Mar 09 '23 at 10:26