iMac Wakes Itself After Set to Sleep

My iMac keeps waking itself up after I set it to sleep. I have no idea why this is happening. I want to say it is because of the Bluetooth mouse and keyboard but I don't have any supporting evidence.

I checked the energy saver settings to allow sleep and allow HDDs to sleep, but my iMac still wakes. I don't use InsomniaX but do use Caffeine, but I never leave it on if I want my iMac to sleep.

bump...

Make sure you close firefox. If you leave it open when you sleep the iMac, firefox will wake it almost immediately

I don't use Firefox. I've noticed that when my iMac wakes, it shows that the keyboard has been connected/disconnected. This keeps happening even when I leave keyboard/mouse idle.

What happens if you go into Sys Prefs/Energy Saver and click on Restore defaults then go Command Option Eject key combo? Mine goes to sleep even with Caffeinne enabled if i use that key combo.

It still turns on

I see you have 10.6.1 try downloading and running this - Mac OS X v10.6.2 Update (Combo)

Unit134679 said:

My iMac keeps waking itself up after I set it to sleep. I have no idea why this is happening. I want to say it is because of the Bluetooth mouse and keyboard but I don't have any supporting evidence.

Click to expand...

I'm willing to bet that this is likely the cause. Do you keep your bluetooth devices on? If so, that's probably the issue.

If I keep my BT mouse on when I put my Mac to sleep, it will wake up 2 seconds later.

oops, I actually do have 10.6.2. I forgot to update my Mac specs.

I do leave my BT devices on at all times, even after putting my Mac to sleep. Is there another way besides turning it on and off? Seems tedious if I momentarily use my computer, then set it hibernate.

I have the exact same problem you described...wakes up, displays that the keyboard or mouse lost connection.
Seems to be very intermittent...happens a few days in a row for a week...then disappears for 3-4 months.
Fresh batteries?, not sure but I could never nail down the problem.

strange isn't it? im clueless what to do

I just noticed that my computer wakes itself up because the keyboard loses connection (turns off?). Battery levels at 35%. Its happening more frequently now.

mighty mouse wakes imac

Hi -
I have the same problem with bluetooth mighty mouse and iMac 2.2 (2008).
Can't put the machine into Sleep mode for more than 3 seconds.

This just started occurring - and intermittently- after a year and a half of pretty reasonable performance.

It persists through my recent upgrade to Snow Leopard.
If I use another (wired) mouse, problem goes away.
I've checked all the power settings, etc.

A bit tedious, really, not having Sleep mode.