Apple has the bad habit of completely discontinuing a previous operating system the instant a new major version comes out. The problem with this is new operating systems have bugs and incompatibilities, and these bugs mean that people who depend on these machines for a living cannot upgrade to the new release right away. For existing machines this is fine, but it basically places a complete halt on the ability to buy new Macs until the issues are worked out, because the new Macs come with the new version and you CANNOT downgrade. Microsoft has always allowed us to purchase and install previous versions of Windows; why can't Apple provide a way to downgrade to a previous release for *at least* a few months after a new OS comes out, so that those who have business operations depending on the previous version can still buy new hardware? They did the same thing with Final Cut, and THANKFULLY relented when enough people complained and allowed them to buy the previous version again. It's just one of my pet peeves, and I was wondering if anyone else shares it.