Mac IIcx and IIcx Note: It was originally believed these patches were only necessary for the Mac SE/30, but we’ve since learned they’re also relevant to the Mac IIx and IIcx, and possibly others too. The information below was taken from Gamba’s Macintosh web page and is preserved here to help ensure it doesn’t disappear from the web. These patches are required when using System 7.5 – 8.1 on certain Macintosh models with an upgraded ROM, such as a Mac ROM-inator II or a borrowed IIsi or IIfx ROM SIMM.
This page describes a small set of patches to Mac OS System 7.5 or later.
