HI jon, thanks for your help macbook air mid 2011.Hope this is the information you asked for
Model Name: MacBook Air
Model Identifier: MacBookAir4,1
Processor Name: Intel Core i5
Processor Speed: 1.6 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 2 GB
Boot ROM Version: MBA41.0077.B15
SMC Version (system): 1.74f4
Hardware UUID: 91F50429-7398-53D6-A3D8-78D9CD4927C1
@Johnfgee Thanks for posting that, I'm sure it'll prove useful to the teams that are looking into the issue. On the Sky Go forums, a lot of users with your graphics card seem to be having the same problem. From what I understand, Now TV suffer from the same issue and are in the process of fixing this, but I have no idea as to when that'll make it's way to us unfortunately.
In the meantime, have you used the Silverlight player before or are you a new user? If you have Silverlight installed on your system, you should be able to watch content via Firefox. I know it's a bit of hassle, but that should at least get you watching stuff until the fix is released. Hope this helps!