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Model A1418 / Late 2013 / 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7 Processor

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freeze & restart when watching youtube :)

3,1 GHz Quad-Core Intel Core i7 + 16GB ram + NVIDIA GeForce GT 750M 1 GB

problem is funny; when watching youtube videos imac freezes, waits & restarts like nothing happened :) no warning before or after

diagnostics found nothing

  • thought it was full of dust and getting hot; opened, cleaned, reassembled - nothing changed
  • installed fan control app to see temp and set fan to work based on CPU PECI temp - nothing changed
  • I thought HDD was doing this and replaced with SSD - nothing changed
  • thought maybe fusion drive was doing this, seperated PCIe ssd with new SSD - nothing changed
  • thought maybe it is macos catalina issue and downgrade to high sierra- nothing changed
  • made clean macos catalina install and used it as brilliant new without installing expect updates - nothing changed

any ideas??

because of it is happening when youtube videos I thought it is from GPU but after reading some articles saw that it may be because of LCD panel and I was jaw dropping that it was just from LCD panel - is it possible to be from LCD panel?

Answer this question I have this problem too

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1 Answer

No, it’s not your LCD panel you more likely have a memory leak in the YouTube App.

I’ve noted RAM usage grows the longer you run YouTube as of late. Get a RAM cleaning app from the app store to flush it every so often.

You might want to monitor Activity Monitor and look at increasing your RAM and storage (Virtual RAM).

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seems it is not RAM - i have cleanmymac installed click “free up ram” few times... imac was fine 2 weeks ago and was capable to stream youtube videos as usual as always


@aterkut - Ouch! I'm not a lover of CleanMyMac, if offers lots of bells and whistles, for some reason its not very good in dealing with memory.

I would use Memory Diag


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Atilla Erkut will be eternally grateful.
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