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Opera not letting Macbook Sleep

  • Have noticed over last couple of days since latest update that my MacBook Pro will not go to sleep anymore.
    I have Energy Saver to sleep the screen in 3 minutes, but there is no sleep had.
    When I check Activity Monitor under "Preventing Sleep" everything open is "No" except for Opera, which is "Yes". When I check the list under Opera, there is nothing with a "Yes" by it, so I am stumped.

    Has anyone else had this issue and found a fix?

    Thank you!

  • Do you have any sites with Flash running? I wonder if Flash can cause this. You can try if this is the cause by disabling Flash completely using Opera -> Preferences... -> Websites (on the left) -> Flash, select "Block sites from running Flash".

  • Or, do you have any running downloads or paused downloads? Opera explicitly prevents sleeping while it's downloading something.