Q: Since 10.9.2, I can't put my iMac to sleep anymore by pressing the power button

On laptops you have to hold the power button down for a couple seconds and it goes right to sleep. Should be the same on the iMac.

Apple modified the power button behaviour in this update.

The times specifed in this Article are no longer accurate: OS X Mavericks: Using the power button

It now works as follows:

< 0.5 seconds: nothing

± 1 second: sleep

± 2 seconds: Sleep / shutdown / restart dialog

± 5 seconds: forced shutdown

Hm …

I tried it on my MacBook Pro Early 2011 and found that it works as follows:

< 0.5 seconds: nothing

1 second: nothing

2 seconds: nothing

3 seconds: nothing

4 seconds: nothing

5 seconds: forced shutdown

I tried rebooting the system and also resetting the SMC, both to no avail.

Any ideas?

Randy, these steps look suspiciously similar to the SMC reset guide that I followed (twice) before posting here …