Shut down takes a long time

[wilywampa]

Early 2011 15-inch MacBook Pro, OS X Lion 10.7.4

For some reason shutting down my computer or restarting takes a long time. I have a Crucial M4 SSD and my boot time is very fast. I looked at the log between shutting down and rebooting and there is only one error. Here is everything from the console from issuing the reboot command to the next boot. There is nearly a minute between the shutdown command and actual shutdown with no console messages during that time. How can I find out what's taking so long?

7/14/12 7:01:31.599 PM shutdown: reboot by jniehus: 
7/14/12 7:01:31.599 PM shutdown: SHUTDOWN_TIME: 1342317691 598780
7/14/12 7:01:31.000 PM kernel: Kext loading now disabled.
7/14/12 7:01:31.000 PM kernel: Kext unloading now disabled.
7/14/12 7:01:31.000 PM kernel: Kext autounloading now disabled.
7/14/12 7:01:31.000 PM kernel: Kernel requests now disabled.
7/14/12 7:01:31.603 PM UserEventAgent: CaptiveNetworkSupport:UserAgentDied:139 User Agent @port=19463 Died
7/14/12 7:02:30.000 PM bootlog: BOOT_TIME 1342317750 0

 

[wilywampa]

Another detail... It only takes 10 seconds or so to get to a grey screen with the rotating/pulsing "loading circle" symbol, where it takes another 45 seconds or so to shut down. For now I'll hard reset it when it gets to that symbol, which isn't entirely safe I'm sure, but I have a Time Machine backup.

 

[The-Pro]

My 2010 15" occasionally takes longer to shut down, with the spinning wheel thing. It does it sometimes, cant figure out why. I think it has something to do with how much data was in the RAM when shutting down or the amount of applications open.
When I run delete caches and stuff in Onyx it usually increases the overall speed of shut down and boot again.

 

[wilywampa]

Good suggestion, but I ran Maintenance and Cleaning in OnyX and my shutdown time is the same as before.

 

[The-Pro]

hmmm ok
try closing everything before shutdown. Then see what happens. Do that twice.
I just had my MBP spin at shut down, i closed everything before I shut down again and it was gone.

 

[wilywampa]

That was one of the first things I tried and it unfortunately made no difference. I had done that before the shutdown that I gave the console messages for in the OP. Otherwise it would have a lot more messages.

 

[wilywampa]

I shut down in verbose mode and that gave me some new information.

Here are some of the last few lines. The long delay is before it says "continuing"

com.apple.launchd 1    com.apple.launchd 1    System: About to call: reboot(RB_AUTOBOOT).


continuing
unmount of /home failed (45)
unmount of /net failed (45)
done
MACH Reboot

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I did some Googling and found that this problem can be caused by Parallels. I really don't want to remove Parallels because I need it. I guess I'll have to deal with the slow shutdown unless there's another solution.

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http://forum.parallels.com/showthread.php?t=113543&page=6

There's a discussion regarding this issue. Sounds like my exact problem, and there is no solution.