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Question: Drive Not Ejected Correctly.

After my iMacOS High Sierra goes to sleep, when I wake it up a notice tells me that one of my external drives has not been ejected correctly. How do I prevent this happening?

iMac, OS X Mavericks (10.9)

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Configure your Energy Saver preferences like those above. Ignore the first checkbox setting. Use whatever you want for that one.

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Mar 12, 2018 6:26 AM in response to Xabiablanca In response to Xabiablanca

Xabiablanca wrote:


Strangely despite having latest updates I don't have the Enable Power Nap option, however copied other tick boxes as per screen shot and it seems to be OK now.

That is very odd. Power Nap has been a feature since OS X 10.8.

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Mar 12, 2018 7:27 AM in response to Xabiablanca In response to Xabiablanca

Apparently you are not missing anything. I was checking the specs of a Mid-2011 iMac for someone else and found this on everymac.

*This system fully supports the last version of OS X 10.8 "Mountain Lion", OS X 10.9 "Mavericks", and OS X 10.11 "Yosemite" except for Power Nap functionality.

It also runs up to High Sierra as you know but without Power Nap among other features.

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Question marked as Helpful

Mar 12, 2018 6:26 AM in response to Xabiablanca In response to Xabiablanca

Xabiablanca wrote:


Strangely despite having latest updates I don't have the Enable Power Nap option, however copied other tick boxes as per screen shot and it seems to be OK now.

That is very odd. Power Nap has been a feature since OS X 10.8.

Mar 12, 2018 6:26 AM

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Question marked as Helpful

Mar 12, 2018 7:27 AM in response to Xabiablanca In response to Xabiablanca

Apparently you are not missing anything. I was checking the specs of a Mid-2011 iMac for someone else and found this on everymac.

*This system fully supports the last version of OS X 10.8 "Mountain Lion", OS X 10.9 "Mavericks", and OS X 10.11 "Yosemite" except for Power Nap functionality.

It also runs up to High Sierra as you know but without Power Nap among other features.

Mar 12, 2018 7:27 AM

Reply Helpful (1)

Mar 12, 2018 9:34 AM in response to Xabiablanca In response to Xabiablanca

Xabiablanca wrote:


Yes, but here is my screen shot of Energy Saver. Am I missing something, a switch somewhere or similar?




Not all hardware support this newer feature:

Which Mac computers can use Power Nap?

You can use Power Nap on these Mac models:

  • MacBook (Early 2015 and later)
  • MacBook Air (Late 2010 and later)
    Requires OS X Mountain Lion v10.8.2 and later
  • MacBook Pro (all models with Retina display)
  • Mac mini (Late 2012 and later)
  • iMac (Late 2012 and later)
  • Mac Pro (Late 2013)


How Power Nap works on your Mac - Apple Support

Mar 12, 2018 9:34 AM

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Question: Drive Not Ejected Correctly.