Mac OS 8 8.6

Apple Mac OS 8 was another major overhaul of the OS from the earlier Mac OS 7. It added a new Platinum visual theme, a multi threaded Finder, better virtual memory, and many customization options. 8.5 and later require a PPC CPU. It was followed up by Mac OS 9.

Running MacOS 8 requires a supported Motorola 68K or Power PC based Macintosh (see the compatibility matrix), or one of the following emulators:

Basilisk II - Runs MacOS 7.x-8.1, emulates later color Motorola 68k based Macs.

SheepShaver - Runs MacOS 7.5.2-9.0.4, emulates a Power PC based Macintosh.

Other Mac OS Versions:
| 1.x-6.x | 7.x | 8.x | 9.x | MacOS X | All |

Release notes

8.6 was a minor release that mainly increased stability and increased battery life on laptops.

Apple offered a free update to 8.6 for users of 8.5 and 8.5.1.

Installation instructions

Emulation notes: To run MacOS 8.6 on newer hardware, we recommend the SheepShaver emulator, which emulates a PowerPC Macintosh.

Note: The foreign language versions that were here were corrupt and have been removed. If you have a foreign language version you would like to contribute, please see our contributions page.

Product type
Release date
Minimum CPU
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Minimum free disk space
User interface
Download count
54 (7 for release)


Download name Version Language Architecture File size Downloads
Apple Mac OS 8.6 (''Horatio'' 8.6.A3C4 Update A) 8.6 (''Horatio'' 8.6.A3C4 Update A) Prerelease English 33.27MB 1
Apple Mac OS 8.6 (ISO) 8.6 English 121.6MB 6


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