I am using an older non intel dual processor mac with ox x 10.5.8 and continue to get messages that my Safari is no longer supported. I cannot download any current browser because they don't work with my current operating system. Am I stuck with buying a new operating system? The computer works great and I hate to go to the trouble of purchasing and learning a new system when everything else seems to work fine. Frustrating that it seems as if I am being forced to upgrade when it is not needed.