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Mac OS 8.7 Pre-release (Sarah)

Your rating: None Average: 4.3 (6 votes)
Year released:
[www].se [ftp].se [mirror].us
mac-os-87-sarah.sit (151.57 MB)
MD5: 674180f34dc4f4455d127fcec716ff8a
For Mac OS 8.5 - 8.6 - Mac OS 9
[www].se [ftp].se [mirror].us
Mac_OS_8.7a6c3.sit (157.70 MB)
MD5: 640492e3769b2e1c42026756fa6b8691
For Mac OS 8.5 - 8.6 - Mac OS 9
[www].se [ftp].se [mirror].us
Mac_OS_8.7b3c3.sit (157.69 MB)
MD5: 3d02b7a724f7af286d6ec3879f4741b6
For Mac OS 8.5 - 8.6 - Mac OS 9
[www].se [ftp].se [mirror].us
Mac_OS_8.7J-b2.img_.sit (292.74 MB)
MD5: fac55917d43092d5e1f03d68a7056b1e
For Mac OS 8.5 - 8.6 - Mac OS 9
This app works with: SheepShaver,

This is beta (8.7.A6C2 A) of the never released Mac OS 8.7, codenamed "Sarah". Mac OS official releases went Mac OS 8.6 then Mac OS 9.0, skipping 8.7 or other increments altogether.

This copy was sourced from WinWorldPC and has been repackaged from .7z to a more "Mac friendly" Stuffit 5.5 ".sit" format. The archive contains a Disk Copy 6.3 disk image file.

I've run Sarah (8.7 A6C2 A) on SheepShaver for a short while, so far it seems quite stable. It has several of the new features that appear in Mac OS 9.0 such as Multiple Users, Keychain, Sherlock II, etc.

The codename “Sarah” replaces the Mac OS's "Special" menu in this build, denoting its non-release status.

This image file is not bootable. I recommend booting up from an existing OS, mounting the image to run the installer and install this beta to a spare partition, a spare drive, or onto a new drive container (SheepShaver), before booting up with this OS. - That is; don't overwrite your only stable OS!

Architecture: PPC

Runs on any PPC Macintosh, clone or emulator capable of booting & running Mac OS 8.6


os9er's picture
by os9er - 2016, December 24 - 5:38am

This is actually pretty cool. I tried running it in SheepShaver awhile back - it seemed stable enough. I tend to think it would even have been all right for everyday computing, "way back when".

supernova777's picture
by supernova777 - 2014, September 30 - 10:24pm


MikeTomTom's picture
by MikeTomTom - 2011, October 13 - 11:34am

I've been running 8.7 (A6C2 A) now for a few weeks on SheepShaver. It works really well on SS also on an old beige G3 upgraded with a Sonnet G4 CPU. It gets more glitches on the beige, no System crashes so far, but the Chooser will crash and also Stuffit Expander 5.5 crashes with type 3 errors, otherwise its pretty good as an OS.

[Edit] "updated" to 8.7a6c3. This alleviated the Chooser crashes but introduced new bugs. USB conflicts with the Mac Sound controllers. May not be an issue with iMac or newer Macs, but with a beige Mac like mine, for USB, an adapter card is required and to enable the card there is only USB enabler 1.2 or 1.4.1.

Installed 1.4.1 so I could use a multi button USB mouse. Mouse worked great but sound stopped working - Music, video, or games are now a "no go area".
"Down-graded" to the earlier USB 1.2 - Music etc works again... mouse drivers no longer function Sad

Long story but to keep it short-ish, installed OpenGL 1.2.1, Games Sprockets 1.7.5 on top of 8.7a6c3 and USB adapter software 1.2 and everything is working again, mouse, music, games, video & sound. Yay!

I'm not going to try the next 8.7 beta (8.7b3c3) as I believe the USB issues didn't get any better until Mac OS 9.0.4 was released (and things are no longer broke, so I don't want to push my luck).

Anyway, I'm having fun with this unreleased version of the OS, its more like the direction I would've liked to have seen the Mac OS go in... instead of what we got with 9... mostly superficial cosmetics tho', 9 is OK too.

24bit's picture
by 24bit - 2011, September 25 - 3:20pm

Looks good. For those interested is that kind of material, there are also Horatio and Copland here: .The files were taken from WinworldPC as well but I did not feel the need to try.