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enter image description here This message keeps on popping up again and again. I tried restarting my Mac and did no good. I thought it was steam causing these problems but deleting it did not make any difference.

Do you think this is a problem with MacOS Mojave? Please help me.

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  • open the report and look where it says "process responsible .... it should be about 10-20 lines down
    – Ruskes
    Dec 14, 2018 at 4:05
  • can you find that process SystemExtr in the Activity Monitor
    – Ruskes
    Dec 14, 2018 at 4:20

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No, this is not a problem with macOS Mojave. I've seen this before and it was caused by an app hiding within the Library folder.

Unfortunately I don't recall the app, but I do recall how we got to the bottom of it. In summary:

  1. Install EasyFind (it's free from the Mac App Store)
  2. Search for SystemExtr
  3. Identify the file (app) responsible
  4. Remove it

As mentioned, from memory it was sitting in the Library folder.

NOTE: I am in no way affiliated with EasyFind.

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if you click on the report button you will see the location of SystemExtr. I had also the same problem and mine was located under ~/Library/SystemExtr so I removed the whole folder and it stopped to show up anymore.

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  • what is it ? what app/process uses it ? I do not have it on High Sierra.
    – Ruskes
    Dec 14, 2018 at 7:56
  • I don't know to be honest, I found this link and they think it is a malware.. although I cannot say. I think it is a new thing, so better keep an eye on the news in near future as it might be something else remaining on the system as well...
    – lowselfesteemsucks
    Dec 14, 2018 at 9:27

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