MacBook Pro won't wake from sleep

You are not alone! I'm experiencing the same problem!

I have a base model MacBook Pro 15 inch mid 2015. Occasionally, it doesn't wake from sleep when I open the lid. It shows the black screen with a backlight on. After about 10-20 seconds, the cursor appears, but the system does not respond. Sometimes it wakes up normally after being asleep for a full night and sometimes it cannot wake after only of 1 hour of sleep.

I have tried everything that I could: Resetting PRAM, SMC, reconnecting the battery, reinstalling the OS. I have tried all major versions: 10.10.5, 10.11.6, 10.12.4. All having the same issues. I have even tried installing the OS on an external SSD. Even from there it doesn't wake from sleep. The only thing I've noticed while working from external SSD for about three days is that my internal SSD 2-3 time disconnected by itself and OS was no longer recognising it until I've restarted my Mac. So I unchecked "Put hard disks to sleep when possible" setting and this problem has gone. But I was still unable to wake the Mac from sleep when I opened the lid. Apple Diagnostics does not report any problems.

I have a Mac Pro Early 2008 and have the same problem. My solution since there is no fix: Under "Energy Saver" in "System Preferences", set "computer sleep" to "never". When I'm finished using the computer, I then generally shut it down. The problem doesn't occur when I do this. Hope this helps someone as this has been a frustrating issue for me for many years until I tried the above.

I have a 15" MacBook Pro mid-2015 that has had this issue since new. The factory installed OS was 10.11.6 but I updated it to 10.12.6 after I was able to resolve the wake from sleep issue. After trying everything mentioned in this thread - and many more power settings using Terminal - the problem remained. A while ago, I read that power nap might be the culprit. I disabled power nap and the MBP now wakes from sleep under all circumstances. Give it a try if you haven't already and see if it helps.

By the way, I have a Time Capsule and this MBP backs up to it automatically. I can't say for certain, but I think it might be part of the problem. I didn't test this because I am unwilling to disable Time Machine with the Time Capsule.

Hope some of these observations help.

Rob RS125R wrote:

By the way, I have a Time Capsule and this MBP backs up to it automatically. I can't say for certain, but I think it might be part of the problem. I didn't test this because I am unwilling to disable Time Machine with the Time Capsule.

I am not using Time Machine and still experiencing the wake-from-sleep issues on this model.

You can check the "If your Mac doesn't sleep or wake when expected" info page - If your Mac doesn't sleep or wake when expected - Apple Support

One thing I would recommend you do is fully shut down your computer when not in use. It could be that the battery becomes very low, the hard drive turns off, etc.

Hi,

The odds that you got two 2015 MBPs in a row which are defective are quite slim.

Have you tried reinstalling the OS yet?

Have you installed any software which could affect sleep?