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iMac (Retina 4K, 21.5

iMac (Retina 4K, 21.5-inch, Late 2015)

3.1 GHz Intel Core i5

8 GB 1867 MHz DDR3

Intel Iris Pro Graphics 6200 1536 MB

10.12.6 (16G29)

Slows down a lot after using it for a little while; surfing with Yahoo

The display showed bands and the screen dimmed; did this for a couple times

Ran First Aid,everything was good

What's going on?

Thanks

Please determine if the same problems occur in "Safe Mode": Use safe mode to isolate issues with your Mac - Apple Support.

最後更新：2017-09-01 00:48:52

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