Whenever I use pmset sleepnow in Terminal (even with sudo) I get this error: Unable to sleep system: error 0xe00002e2. I have no idea what's going on. Please help!

  • Are you on the latest version of your firmware? This thread mentions that there were problems with old firmware.
    – JMY1000
    Mar 4, 2016 at 20:19
  • I don't have any updates available in the App Store... Does that mean I have the latest firmware?
    – atirit
    Mar 4, 2016 at 22:20
  • No, firmware updates don't show up on the app store. Follow this guide.
    – JMY1000
    Mar 5, 2016 at 22:25
  • Followed it; I have the latest FW version for my model.
    – atirit
    Mar 6, 2016 at 1:33
  • Afraid I don't know then, sorry.
    – JMY1000
    Mar 6, 2016 at 4:09

1 Answer 1


I struggled with the problem for months without any luck; the computer was unable to sleep, the sleep option on the apple menu was greyed out, pmset -g assertions (the most popular suggested solution to find ongoing processes) didn't return any result, and resetting the SMC didn't work. Today I finally found the solution that worked for mine

sudo pmset -a disablesleep 0

Hope this works for others too!

  • Welcome to Ask Different! The background info is good, but the info about the solution seems to be missing. Can you provide some details, links, or references?
    – Allan
    May 21, 2016 at 13:09

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