Another problem that has occurred during the past couple of years with some Mac users ...
Several websites are using Microsoft Siverlight instead of Shockwave Flash and Adobe Flash. One of those websites is Unversal Sports.com. Last year several members of a message board I belong to were quite upset because they couldn't watch some of the figure skating events due to fact that it wasn't compatible with their version of Macs they had. Some of the figure skating like The Grand Prix series was only shown at Universal Sports.com.
Here are the requirements that are needed to be able to use Silverlight 3. I found the requirements at the Microsoft Silverlight site. I didn't find the requirements for Silverlight 4 and haven't checked yet to see if I have that but I have no problems with the Silverlight Player at Universal Sports.com:
The system requirements for Microsoft Silverlight and associated technologies are listed below.
•Operating System: Windows 7,Windows Vista; Windows XP Service Pack 2
•Intel® Pentium® III 450MHz or faster processor (or equivalent)
•128MB of RAM
•Operating System: Apple Mac OS X 10.4.8 or above
•Intel Core™ Duo 1.83GHz or faster processor
•128MB of RAM
So, from what I understood with some of the members was that their OS was PowerPC/Safari or an OS lower than 10.4.8. I really don't know all the operating systems for Mac because I've never had the desire to even want to one due to all its complications like the issue with using Silverlight.
The majority of the members that owned Macs were totally upset because of the fact they couldn't watch figure skating ... especially The Grand Prix Series at Universal Sports. I figure if they want to see it in the future then they will have to purchase a new Mac ... one that has OS of 10.4.8 or better ... or they can purchase a Microsoft Windows laptop where they won't have to worry about whether future upgrades of Silverlight will work on their Mac or not.
All I know to say is that Mac users better get used to it ... more and more websites are using Silverlight.
ETA ... I knew I had the latest version of Silverlight which is 4.0.50524.0 and I received it through Windows Update after my new hard drive was installed. I'm not sure what the requirements for this version is for Macs but I do know if these members that couldn't watch the Grand Prix Series last year are still using the same Macs then they probably won't be able to watch it at Universal Sports this year, either.