Just A Head Mac OS
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Win 7 takes a EFI to BIOS patch and Apple just won't make one for the newer Mac's. One cannot downgrade a new Mac to a older version of the OS X operating system to work with hardware/software like one can do with a Windows PC and certain 'Pro' versions or better. Apple is Evil, pure and simple. Just boot up from the OS X Installer CD and go to Utilities Firmware Password Utility and set a firmware password. This prevents other folks from being able to boot up your computer from another. Step One: Download macOS Installer files. You can download the Mac OS Installer file from App Store. Or, if you don’t find the required OS on the App Store, then you can download the Mac OS Installer files from ISORIVER. Step Two: Formatting Your USB Flash Drive. You can create a boot installer for macOS on Mac. This is especially the case with a Mac, which keeps all kinds of stuff behind the scenes. Whether you’re setting up a new system or installing a new version of OS X, now’s a good time to check.
IIfx_Mac_OS_8.1_volume.sit (18.78 MB)
MD5: b23b2cae35b098301192e1279e2692ce
For Mac OS 8 - 8.1
Guides on emulating older applications
It is possible to install Mac OS 8.1 onto a Mac IIfx and I have done so (it involved ResEdit).
The file above is a stuffed (v4) copy of my bootable Mac OS 8.1 volume.
I'd be happy if someone else would try to see if they can use it on their IIfx. Indeed, it may even work on other 68030 Macs. This I haven't tried yet. Mac OS 8.1 needs at least 16 MB RAM.
Just A Head Mac Os X
My IIfx doen't feel that much slower (in comparison to System 7.1) and I installed it so that I could access the HFS+ volumes on my B&W G3.
Compatibility