With the release to RTM of Windows Vista SP1, I was curious how Microsoft’s release schedule for OS’s and Service Packs matches up against Apple’s.  So I quickly searched Wikipedia for the release dates, and hopefully they are accurate.

I simply mapped the dates for all the desktop OS releases and service packs from 2000 to present which looks like this:



I know that Apple’s OSX 10.5.1 was released in 11/2007, but does this qualify as a Service Pack?   There is a historical breakdown of the version changes of Mac’s OSx, but I have not had the chance to go through it.  You can visit the History of Mac OS to read the differences.

Also I did not see much information on OS9 post 2000, but maybe it was on the decline since everyone was switching to OSX, so not many releases were in the pipeline.

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