Many of you have been wondering, If my Power Apple Macintosh computer included System 7.5.3 pre-installed on the hard drive. However, I have heard that the pre-installed version of System 7.5.3 is not the same as the version of System 7.5.3 that you get by installing System 7.5 Update 2.0.

Does this mean I also need to install System 7.5 Update 2.0?

Do I then need to install System 7.5.3 Revision 2 as well?

Can I skip installing System 7.5 Update 2.0 and just install Revision 2?

Directly from Apple Computer comes the answers.

System 7.5 Update 2.0

System 7.5 Update 2.0 includes some additional fixes that are not included with the pre-installed version of System 7.5.3. So, even though your computer included System 7.5.3, you could avoid potential issues by also installing System 7.5 Update 2.0. Refer to the chart at the end of this article for instructions on obtaining specific information about the issues resolved with System 7.5 Update 2.0.

Revision 7.5.3 Revision 2

Revision 2 is a set of six system software enhancements that improves the reliability and performance of some computers using System 7.5.2 (on PowerBook computers only) and System 7.5.3. If you have one of the following computers, you should install System 7.5.3 Revision 2:

* All PowerBook systems using Connectix RAM Doubler

* All PowerBook 5300 and PowerBook Duo 2300 systems

* All PowerBook 200 or 500 Series systems which have been upgraded with the Macintosh PowerBook Processor Card Upgrade Kit with PowerPC (or upgraded with similar third party products).

* All Macintosh 7200, 7500, 7600, 8500, and 9500 systems

Refer to the chart at the end of this article for instructions on obtaining specific information about the issues resolved with System 7.5.3 Revision 2.

System 7.5 Update 2.0 vs. System 7.5.3 Revision 2

System 7.5 Update 2.0 and System 7.5.3 Revision 2 do not include the same updates and fixes. System 7.5 Update 2.0 updates any computer running System 7.5, 7.5.1, or System 7.5.2, and consists of approximately 14 floppy disks. However, Revision 2 is for specific computers only, and only consists of 2 floppy disks.

It is possible to have a computer that requires only System 7.5 Update 2.0 and not Revision 2. However, it is not possible to install Revision 2 on a computer that does not already have System 7.5.3 or System 7.5 Update 2.0 installed.

Hope this helps!

 

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