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Mac OS 7.5.3 Revision 2.2, or System 7.5.3 Revision 2.2, is an update (revision) to Mac OS 7.5.3 (System 7.5.3). Its Apple code name was Unity.

The third revision in the Mac OS 7.5.3 revision series, it is curiously unknown to much of the Mac community. Released in 1996, it only affects the following models:

No other models were affected.

Sources and Evidence of Existance



System 7
System 7.0.x: 7.0 | 7.0.1 | Tune-Up 1.0 | Tune-Up 1.1 | Tune-Up 1.1.1
System 7.1.x: 7.1 | 7.1.1 (Pro) | 7.1.2 | 7.1.2P
System/Mac OS 7.5.x: 7.5 | 7.5.1 | 7.5.2 | 7.5.3 | 7.5.3L | 7.5.3 Rev 2 | 7.5.3 Rev 2.1 | 7.5.3 Rev 2.2 | 7.5.4 | 7.5.5
Mac OS 7.6.x: 7.6 | 7.6.1
Performa Systems: 7.0.1P | 7.1P | 7.1P1 | 7.1P2 | 7.1P3 | 7.1P4 | 7.1P5 | 7.1P6 | 7.1.2P
← System 6 | System 7 | Mac OS 8 →