Since upgrading to OS X Yosemite I've experienced that sometimes when reloading a web page (CMD+R) Safari doesn't reload the page but downloads a file named Unknown.

Is there any way to fix this?

  • Did you ever figure this out? It's such a pain!
    – Rog
    Dec 1, 2014 at 1:02
  • @Rog Unfortunately no
    – Daniel
    Dec 1, 2014 at 6:39
  • I'm having the same issue. Not always, but on occasions pressing Cmd+R to reload, just results in a download of an empty file named 'Unknown'. It's somewhat annoying.
    – Ernesto
    Dec 13, 2014 at 15:38

2 Answers 2


I suspect it is not an empty file but malware from 'carpet bombing'. Do not attempt to open the file but get info on the file and you should see it is from known malicious sites. I am scanning my system right now using ClamXav and nothing is coming up bad so I suspect it will go away if you just keep trashing the files until the hacker gives up. If anyone knows more than this please contribute.

  • I'm getting them too. They are empty files (zero byte TextEdit documents).
    – xxxxxxxxx
    May 26, 2018 at 23:07

A file with 0 Bytes is just annoying but harmless. Opening a 0-byte-file is harmless, too, because it contains nothing.

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