![]() I (and probably many others here) have combo update DMGs for 10.6.7, 10.6.8, and 10.6.8.1, but they won’t help you. Those versions shipped on March 21, June 23, and July 25, respectively. However, when I boot from the installation, it fails. Anyway, I finally got Snow Leopard installed with these boot options:'-x -v -f acpioff PCIRootUID0 GraphicsEnablerNo'(without quotes). So, unless you can find a 10.6.6 installer disk that actually shipped with a Mid 2011 iMac, I think you’ll need to find an OS X 10.6.7, 10.6.8, or 10.6.8.1 full installer. Works for everyone whether you are on Windows, Linux or Mac with no complicated install instructions. I got SUSE Studio imagewriter on my centos box. Wikiepedia gives the release history of 10.6, which shows that DMG (and mine) must be the original full 10.6.0 installer.Īccording to Mactracker, the Mid 2011 iMacs came with 10.6.6 (10J4026), which is not listed at the Wikipedia link above - the standard 10.6.6 version was 10J567. It’s basically impossible, usually, to install versions of the OS earlier than what a Mac shipped with. I believe you answered your own question in the original post. Once you see the macOS Utilities screen choose the Reinstall. Start up your Intel-powered Mac pressing Shift- Option/Alt -Command-R. ![]() I normally completely erase my laptop but I don’t want to do that to the iMac. Here are the steps Apple describes: Shut down your Mac. Can the problem be that I am booting into El Cap on the iMac and trying to install from there? Maybe I need to make a bootable USB drive.
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