2007 iMac won't sleep for more than 30 minutes

hey,

2007 imac running 10.7.3 4 gb of ram not stay asleep longer. have set sleep automatically every night @ 11pm , hasn't been lately, wake sometime later between , 7am.

apps have running in background dropbox, arq, , f.lux. leave chrome , excel running @ times.

1 thing noticed there lot of messages regarding 1password helper respawning among other things throughout night. issue has been going on months , have not installed applications cause behavior. app store version of 1password.

noticed few times well:

code:

3/4/12 12:10:10.000 kernel: wake reason: rtc (alarm) 3/4/12 12:10:10.000 kernel: rtc: maintenance alarm 2012/3/4 05:10:10, sleep 2012/3/4 04:10:20 3/4/12 12:10:10.000 kernel: previous sleep cause: 0

any appreciated.

 

you may find useful ideas here:

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