Cannot shut down or restart

why cant i restart or shut down my new imac

Usually means one or more processes are corrupted and unable to shutdown.
Open Activity Monitor in the Utilities folder. Select All Processes from the Processes dropdown menu. Click twice on the CPU% column header to display in descending order. If you find a process using a large amount of CPU time, then select the process and click on the Quit icon in the toolbar.  Click on the Force Quit button to kill the process.  See if that helps.  Be sure to note the name of the runaway process so you can track down the cause of the problem.
Problems may arise from corrupted preference or cache files.  You might try this as a start:
Boot into single-user mode.  After startup is completed you will be in command line mode and should see a prompt with a cursor positioned after it.  At the prompt enter the following then press RETURN after each commandline:
/sbin/fsck -fy
If you receive a message that says "***** FILE SYSTEM WAS MODIFIED *****" then re-run the command until you receive a message that says "** The volume (name_of_volume) appears to be OK."  If you re-run the command more than seven times and do not get the OK message, then the drive cannot be repaired this way.
If you were successful then enter:
/sbin/mount -uw /
rm -rf /System/Library/Caches/*
rm -rf /Library/Caches/*
reboot
I suggest you print out the above to be sure you do not make any errors when entering the commands.  When in single-user mode you have 'root' access, so it's important that you not make any mistakes.

Similar Messages

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    OK, re-typing this message after yet another kernel panic. Why can't these browsers auto-save text that's being typed into fields in message boards? Ugh.
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    R C-R wrote:
    DaddieMac wrote:
    And I would note I did not bring the problem forward, but the Migration Utility did, which should know better, to be honest.
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    Yeah, I've been doing this for awhile but to no avail. I took out a lot of stuff, frameworks and internet plug-ins etc., that dated back to 2001 or 2007 etc. Some were PowerPC items. I also installed Rosetta since I read somewhere about a Rosetta problem causing the machine to freeze during shut-down, but installing Rosetta did not help. Nothing helped.
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    Regarding that, I can tell you that I have a BJUSBMP.kext in my system & it is OK -- it's part of the Canon printer package ("BJ" refers to bubble jet, I think). I don't recognize any of the others you have listed.
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