iMac 2015 retina Glitch

Hello

I bought the new Imac 2015 retina (4 GB RAM) last month.

I was surfing the internet when suddenly a problem as it appeared:

https://www.Flickr.com/GP/_ego_/8R0TPx

I don't know why, but now my iMac is much more slow and unstable. A way to fix it?

Thank you.

I would say that a trip to the local Apple Store could be in order.

Tags: Mac

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