What's more powerful than force quit?

Discussion in 'macOS' started by mfacey, Nov 23, 2005.

  1. mfacey macrumors 65816


    Feb 1, 2004
    Yes, force quit isn't doing the trick for me right now. iTunes is hanging right at this moment and I can't even shut down safely because the OS can't close iTunes. Very annoying. Is there anyway I can get it to shut down itunes (besides force quit) so I can safely reboot?
  2. Will Cheyney macrumors 6502a

    Will Cheyney

    Jul 13, 2005
    United Kingdom
    That's happened to me a couple of times. After selecting force quit numerous times and resulting in nothing, I just left it.
    I came back after watching a TV show and it had quit! I guess it just got itself in a loop and just needed a bit of time to work it out :D

    Failing that, just force restart (hold the power button in for ~5 seconds). It's quite safe.
  3. Lacero macrumors 604


    Jan 20, 2005
    2. Command+Option+ESC

    1. Pull the power cord. Tied with flipping the switch on the surge protector.
  4. Flying Llama macrumors 6502a

    Flying Llama

    Aug 4, 2004
    Los Angeles
    Try opening up the Terminal (Applications -> Utilities) and type in "killall iTunes" without the quotes. Good luck!

  5. ToastyX macrumors regular

    Oct 4, 2005
    If you can open a terminal, type in the following: killall -9 iTunes
  6. sushi Moderator emeritus


    Jul 19, 2002
    Quit any Classic applications

    Force Quit Classic

    Force Quit Finder

    By then, you might be able to Force Quite iTunes

  7. pknz macrumors 68020


    Mar 22, 2005
  8. solaris macrumors 6502a


    Apr 19, 2004
    Oslo, Norway
  9. DXoverDY macrumors 6502a

    Apr 19, 2005
    kill -9 PID is the ultimate killing machine. ;)
  10. iSaint macrumors 603


    May 26, 2004
    South Mississippi y'all, near the water!
  11. kainjow Moderator emeritus


    Jun 15, 2000
    That's one of my favorite commands :)
  12. Spectrum macrumors 6502a


    Mar 23, 2005
    I'm having a similar problem with my PB when it tries importing (or trying to read) a scratched CD. It just sits there futilely spinning up the disk, and then failing, and then trying again ad infinitum - it does not sound good - and iTunes is beachballing along with anything else running, and neither force quit nor eject does anything. (I can't even get the force quit dialogue box to open).

    I have to turn off the comp by holding the power button (thus losing any unsaved data). Is there another other solution to such a CD/DVD freeze (aside from not trying to import scratched CDs ;)) ?
  13. iEdd macrumors 68000


    Aug 8, 2005
    What's the difference between:
    killall iTunes
    killall -9 iTunes and..
    killall -9 PID ???
    I'm guessing that the last one force quits everything, but what do the first 2 do?
  14. mkrishnan Moderator emeritus


    Jan 9, 2004
    Grand Rapids, MI, USA
    PID is actually short for the process identification number. I don't think, unless I misunderstand, that you type in the "PID" -- you have to use ps -aux or some other method to get the PID, and then you use it in place of the word "itunes" to identify the process.

    Adding the -9 changes the signal sent from "Terminate" to "Kill" -- according to the way Unix works, with the former signal, the program can ignore or refuse the signal, but with the latter, it can do neither.

    P.S. ... once you've got terminal open, if what you want is to shutdown, and are unable to do so, "shutdown -h now" should do it for you, without you having to figure out what app is preventing you from quitting. :)
  15. savar macrumors 68000


    Jun 6, 2003
    District of Columbia
    killall is a command that piggybacks on the more common command, kill.

    kill takes a pid (process id) number as an argument, and usually sends that process a TERM signal. applications receive TERM signals in a special handler and can handle them however they want. usually they perform some quick cleanups (closing files, e.g.) and then return to the shell. but an application could, in theory, ignore this message and keep right on running.

    kill can send other signal to applications, however. this might be advantageous because some signals cant be blocked, such as the KILL signal, which is also numbered 9. so when you kill -9, thats the same as saying kill -KILL, which basically ensures that a program closes.

    killall takes a process name as an argument, instead of a pid, because for a human its usually easier to guess the name than the pid. (to find the pid, you'd need to lookup the process, e.g. "ps aux")

    as far as i know, killall -pid is not a valid command. i dont know of any way to kill *all* processes without writing a command that lists every single process, such as

    killall Finder iTunes AppleWorks etc...

    killing certain processes can wreak havoc though, so dont just go around killing random stuff.
  16. kbonnel macrumors 6502

    Mar 1, 2004
    In a nice place..
    I have sometime noticed that if Force Quit doesn't work I can get the process killed by opening up the activity monitor and doing a force quit from there. Seems to work for me. (or kill -9 from the terminal if I have it open at that time)

  17. Will Cheyney macrumors 6502a

    Will Cheyney

    Jul 13, 2005
    United Kingdom
    Awesome! I love learning new Terminal commands... I know absolutely nothing about it really. It'd be useful sometimes though.
  18. Angrist macrumors 6502

    Mar 11, 2005
    MI or NJ
    Good god, pull the power cord?

    What kind of solution is that?

    Open the Activity Monitor (in Utilities), select the offending process, click the little red stop sign in the upper left hand corner, and select "force quit." This works even when the traditional force quit doesn't.

    I suspect that it sends the "killall" terminal command, but since I always run with the activity monitor on it's faster this way.
  19. Soulstorm macrumors 68000


    Feb 1, 2005
    I may have an alternative...

    Maybe you can quit iTunes by opening the Activity Monitor and then selecting the iTunes process and force-quit.
  20. sushi Moderator emeritus


    Jul 19, 2002
    I did that with a PC the other day.

    Was going to nuke the HD with KillDisk anyway. So rather than wait for 2K to Shut Down I just unplugged it.

    What I hate to say, is that I felt a certain satisfaction to doing it. :D

    On a side note, the worst emergency shutdown that I had to do was when I accidentally dumped about a half litter of water on the keyboard of my PB15.

    - Power Adapter out

    - Remove battery

    Fan sound. WFT? A fan kept going and going.

    - Emergency disassembly of my PB15 to remove the backup capacitor that powers a fan to ensure cooling takes place even if the battery is dead.

    Needless to say this is not how you want to learn how to disassemble a PowerBook.

    Dried everything out for a day or so. Put it back together. All worked fine.

    I was very lucky. :D

  21. mfacey thread starter macrumors 65816


    Feb 1, 2004
    Thanks for all the responses guys!

    Before waiting for all of the responses to my question I got sick of waiting for itunes and just did a hard shut down (using the powerbutton). Worked fine. No other problems to be found. I actually have no idea what caused itunes to hang. Oddly enough the icons on the top right of my screen (like spotlight, etc) didn't work either when itunes was hanging. When I moused over them all I got was a spinning beach ball. Strange considering I relaunched Finder and I don't have anything up there having to do with itunes.

    I'll remember those terminal codes for another occasion though!
  22. Makosuke macrumors 603

    Aug 15, 2001
    The Cool Part of CA, USA
    Worth noting that there is one situation in which even kill -9 doesn't do the trick: If the process is hanging waiting for disk access (either from a network volume or stalled hardware), NOTHING that I'm aware of will cause it to terminate. I've heard a more technical explanation of this, but as I understand it it's a weakness of the kernel that it basically blocks on a wait for disk access.

    This causes issues with flaky FW hard drives and/or networked volumes that aren't responding but the OS won't give up on, and as far as I know it's an architectural issue that there's no workaround for.

    I'd love to hear it if there is, though--I've had problems with this at work that nothing short of a hard power down will fix. On the positive side, 10.4 seems considerably more resilliant when dealing with mounted network volumes.
  23. IJ Reilly macrumors P6

    IJ Reilly

    Jul 16, 2002
    A really, really bad one. Disk directory damage all most for certain.

    Even a power-button forced shutdown should be followed by an fsck.
  24. biohazard6969 macrumors 6502a


    Feb 23, 2005
    toronto canada
    yeah exact same thing happens to me too, i found that the menu bar must be a part of the process named "SystemUIserver" in activity monitor, when i force quit it, spotlight and menu bar stoped hanging and i was able to force quit itunes, but htis was only oon oen specific occation, any ogther time this ghas happened this did not work for me but i'm glad to know that i'm not the only one experiencing these problems

    EDIT: also, the killall -9 iTunes command doesn't do anything either

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