News and Info System 7 Betas Mac OS 8 Betas Mac OS 9 Betas Mac OS X Betas Other Operating Systems News Page About This Site FAQ and Neat Facts Discussion Forum Site Stats System 7.5.3a3c3 (Code name: Unity) System 7.5b2c2 (Code name: Mozart) Mac OS 8.7a6c2 (Code name: Sarah) Mac OS 8.7a3 (Code name: StoneAge) Mac OS 8.6a3c4 (Code name: Horatio) Mac OS 8.5.2d5c3 (Code name: Hanz) Mac OS 8.5f3 Mac OS 8.2d8 (Code name: Snowman) Mac OS 8.0b5 Mac OS 9.0.4f6 Mac OS 9.0.1f1 Mac OS 9.0f9 Mac OS 9.0f4 Mac OS 9.0f3 Mac OS 9.0f2c2 Mac OS 9.0b7c3 Mac OS 9.0b6c3 Mac OS 9.0b4c3 (Code name: Sealed) Mac OS 10.5 Leopard Pre-release (Build 9A321) Mac OS 10.5 Leopard Pre-release (Build 9A241e) Mac OS 10.5 Leopard WWDC Preview (Build 9A241) Mac OS 10.4 Tiger Seed Update 1 (Build 8A171) Mac OS 10.4 Tiger WWDC Preview (Build 8A162) Mac OS 10.3 Panther Server Pre-release (Build 7B33) Mac OS 10.3 Panther WWDC Preview (Build 7A179) Mac OS X Public Beta (Build 2E14) Mac OS X Developer Preview 2 Mac OS X Server 1.2 Copland (Build d11e4) (Code name: Spaz)
System 7.5b2c2 (Code name: Mozart)

Not much is known about System 7.5c2b2 other than it seems to be close to the final version of 7.5 as it's more or less stable (for a beta) and seems to have all it's features intact.
System 7.5b2c2 (Codename: Mozart)
Looks like a pretty standard System 7.5 installation.
System 7.5b2c2 (Codename: Mozart)
This is the first instance I've seen the 'Welcome to Macintosh' screen replaced with another message. Although I haven't seen many pre-Mac OS 8.0 betas.

Obviously this is a photograph of the screen as you can't take screenshots during startup.
System 7.5b2c2 (Codename: Mozart)
Info on the Finder and System files shows when they were created (probably somewhat accurate).
System 7.5b2c2 (Codename: Mozart)
Looking through the extensions folder we find the AudioVision extension with what looks to be an icon that didn't make it into the final version. Although I could be in error.
System 7.5b2c2 (Codename: Mozart)
Two versions of the installer are included, one is a regular version and the other is a debug version containing the 'Wasabi Debugger'. Cute.
System 7.5b2c2 (Codename: Mozart)
Here's a better look at the Wasabi Debugger.
System 7.5b2c2 (Codename: Mozart)
This odd file (MEO Database) is present in the root of the System Folder. It's unknown if it's part of the beta or just some random file sitting around. It's assumed to be debugger related.


Please link to pages, not directly to images. All screenshots are submitted to this site.
We do not have any copies of these operating systems. Nor do we know where to find them.


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