The Overwatch website announces the promised closed beta testing of Overwatch is underway, offering access to some who applied to test the multiplayer shooter. They outline their goals for the test, and say participants are permitted to post videos and impressions from the game. There's also a post on the GeForce website with details for those with NVIDIA graphics cards, explaining what cards will help achieve high framerates at high resolutions, along with system requirements for more typical resolutions. An Overwatch Closed Beta FAQ explains that there will be no OS X version of this (thanks Ten Ton Hammer), and also offers system requirements:

Q. What are the system requirements for the Closed Beta?
A. 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

For the best performance, please be sure to update to the latest drivers available for your graphics card.

Due to potential changes, the system requirements for this game may change over time.