Mavericks won't sleep when closing the lid

Same problem on 15 inch MBP mid 2012. The light stays solid when I close the lid, it doesn't have the pulse like pattern it did with Mountain Lion. Sleep just doesn't seem to be working correctly.

Can you please try to reset the NVRAM?

1. Shut down your Mac.
2. Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.

After resetting NVRAM or PRAM, you may need to reconfigure your settings for speaker volume, screen resolution, startup disk selection, and time zone information. If issues persist, your Mac's logic board battery (not a portable Mac's rechargeable battery) may need to be replaced. The logic board battery helps retain NVRAM/PRAM settings when your computer is shut down. You can take your Mac to a Mac Genius or Apple Authorized Service Provider to replace the battery on the logic board.

http://support.apple.com/kb/HT1379?viewlocale=en_US&locale=en_US

Same problem here with a mid 2009 15in. Macbook Pro. Light stays on solid although it does prompt me for my password after opening the lid back up.

If it were an issue with the PRAM, I don't think it would be happening all of a sudden to so many people who just installed Mavericks. I have a 2007 MBP with the same issue as everone else: light won't pulse, it gets very hot while the lid is closed, I don't think the HHD stops spinning, and sometimes the display won't wake when I open the lid, forcing me to do a hard restart.

found another discussion that suggested resetting the system management controller. It worked for me.

http://support.apple.com/kb/ht3964

Still not working, no matter how I put it to sleep, same thing. Tried the system management thing, and nothing.

this is in no way shape or form a NVRAM or PRAM issue. this started to occur around the 7th developer build for me and hasnt been recified since. prior to this DP sleep was working fine.

Also when i boot up my internal HD installation of snow leopard it sleeps instantly. so obviously it isnt software.

Every will just have to wait for an update

same problem here. Occurred immediately after Mavericks OSX install.

I Upgraded it and run for a few days without problem. Then yesterday as usual i close the lid and left… after a few hours came back and surprised that it was burning hot on the arm rest and the trackpad. Tried reset PRAM and it works for a day. Then today it refuse to sleep again. Frustrated!!

I tried this, which was originally intended for paused shutdowns in Mavericks and it worked for me:

http://www.wired.com/gadgetlab/2013/10/mavericks-issues-and-fixes/#slideid-23467 1

It sometimes takes a while for the sleep to kick in fully but after about a minute the LED phases in and out and the machine stays nice a cool!

This totally worked for me! Thank you! Now my MacBook Pro can now go to sleep again!

I have a late 2012 mac pro, when running mountain lion or even Lion, my machine would always sleep on schedule, where the hard drives would spin down and the white status light would go in to pulse mode. after upgrading to mavericks this is no longer the case although my third party screen would turn off. anyone having the same problem with a mac pro too??

Hey.. this should help out

http://support.apple.com/kb/PH14089

I had this happen about 5 times, once last long closed and when I realized the machine was very hot weather and never slept when closed and the keyboard is the exhaust heat whip remained obstructed.

I've had more problems with my machine in genral this slower, constantly locking and music in iTunes pause a few seconds and then returns to normal, someone could solve this?

no longer close my macbook without turning it off because I have been afraid that this will burn or something like that and not let her to sleep.

Restore a clean intalacion, concerned about the PVRAM, repair permissions, hise the apple hardware test. Failures and no longer continue to do'm very sad.

😟