Since downloading Maverick, my iMac turns itself on, even after I put it to sleep. I go away and when I come back, it's switched on!!!

Question

Since downloading Maverick, my iMac switches itself back on after I have put it to sleep.
It does not do it every time but has done it several times. Any ideas on how to stop this?

Answer 1

If you have more than one user account, these instructions must be carried out as an administrator.
Please triple-click anywhere in the line below on this page to select it:
syslog -k Sender kernel -k Message CSeq wake | awk '/:/{$4=""; print}' | pbcopy
Copy the selected text to the Clipboard by pressing the key combination command-C.
Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window by pressing the key combination command-V. I've tested these instructions only with the Safari web browser. If you use another browser, you may have to press the return key after pasting.
Wait for a new line ending in a dollar sign (“$”) to appear below what you entered.
The output of the command will be automatically copied to the Clipboard. If the command produced no output, the Clipboard will be empty. Paste into a reply to this message.
If any personal information appears in the output, anonymize before posting, but don’t remove the context.