Have you even looked up the specs that are currently required/recommended for the Overwatch beta?
http://us.battle.net/forums/en/overwatch/topic/19592339053
Q. What are the system requirements for the Closed Beta?
See below!
Minimum (targeting 30fps):
>Operating system: Windows® Vista/7/ 8/10 64-bit (latest Service Pack)
>Processor: Intel® Core™ i3 or AMD Phenom™ X3 865
>Video: NVIDIA® GeForce® GTX 460, ATI Radeon™ HD 4850, or Intel® HD Graphics 4400
>Memory: 768 MB VRAM, 4 GB System RAM
>Storage: 7200 RPM with 5 GB available HD space
Recommended (targeting 60fps on Medium settings):
> Operating system: Windows® Vista/7/ 8/10 64-bit (latest Service Pack)
> Processor: Intel® Core™ i5 or AMD Phenom™ II X3, 2.8 GHz
> Video: NVIDIA® GeForce® GTX 660 or ATI Radeon™ HD 7950
> Memory: 2 GB VRAM, 6 GB System RAM
> Storage: 7200 RPM with 5 GB available HD space
The minimum recommended specs, targeting
30 fps, is Intel HD Graphics 4400. The developers have even told all the mac users who got invited to the beta but who cannot install the game to run Windows on their existing hardware. This idea that the hardware is the obstacle is ridiculous.
NVIDIA is also better supporting drivers on OS X in some cards now as well, since Apple doesn't do it.
They wrote a blog detailing it:
http://blogs.nvidia.com/blog/2015/08/31/mac-driver/
And here's a link to the download page:
http://www.nvidia.com/download/driverResults.aspx/89538/en-us