Jon, You might like to run the diagnostic tool called EtreCheck. You can read about it here (and there is a download link on the page) It should help identify the kernel extension or third party software that might be affecting your computer Of course this presumes you can start the computer to run EtreCheck https://discussions.apple.com/docs/DOC-6171
hope this helps. robin On 15 Jul 2014, at 2:54 pm, Ronni Brown <ro...@mac.com> wrote: > Hi Jon, > > Completing the system initialization process via Safe Boot indicates the > issue may be a third-party system initialization item, and you should start > up in Verbose mode to try to identify the problematic item. > > * Start up the Mac while holding down Command-V to initiate Verbose mode. If > the text stops scrolling down the screen, examine the end of the text for > trouble-shooting clues; if you find a suspicious item, move it to another > folder and then restart the Mac normally. > > * At this point you may be able to successfully Safe Boot into the Finder. If > so, use the Finder interface to quarantine suspicious items. > > If you have located a suspicious system item you need to remove, start up the > Mac while holding Command-S to initiate single-user mode. You’ll see a > minimal command-line interface that allows you to move suspicious files to a > quarantine folder. If you want to modify files and folders in single-user > mode, you have to prepare the system volume. > Start by entering /sbin/fsck -fy to verify and repair the startup volume. > Repeat this command until you see a message stating that the disk appears to > be OK. > Only then should you enter /sbin/mount -uw / to mount the startup volume as a > read-and-write file system. > Once you have made your changes, you can exit single-user mode and continue > to start up the system by entering the exit command, or you can shut down the > Mac by entering the shutdown -h now command. > > If you are unable to locate and repair the problematic items, you may need > to Erase & Reinstall OS X on that volume. > > Note: If after an Erase & clean install you still experience problems, I > would suggest you take the computer to an Apple Technician. > > Cheers, > Ronni > > > On 15 Jul 2014, at 1:56 pm, Jon Davison <jondcamera...@me.com> wrote: > >> Thanks Ronnie. Restarted in normal mode, but did a permission repair during >> Safe Mode (lots of 'ACL found but not expected' plus Warning: SUID >> file…..has been modified and will not be repaired'). >> >> After reboot, I can get through the startup now and into an app like say >> Safari, then spinning coloured ball appears and it's all over. Can't even do >> Force Quit on any app. There are still the small horizontal lines on 'Space' >> screen saver background, looking as though the screen is fragmenting. >> >> So problem still exists when rebooted in normal mode. What do you reckon >> this indicates? >> >> Kind regards >> Jon >> >> >> On 15/07/2014, at 12:44 PM, Ronni Brown <ro...@mac.com> wrote: >> >>> Hi Jon, >>> >>> I suggested you Start Up in Safe Mode. When you boot into Safe Mode (Shift >>> Key),leaves OS X running in Safe Mode. >>> The system will perform a file system consistency check using the >>> "fsck_hfs" tool. >>> During Safe Boot, the system clears specific caches, carefully tests >>> startup procedures, and limits automatically launched processes during each >>> stage. >>> While running in Safe Mode, many non-essential system and third-party items >>> are ignored. >>> >>> Doing a Safe Boot will often clear problems. >>> Restart normally after doing the Safe Mode startup and see if it has >>> cleared the problems. >>> >>> If not we would need to investigate further. >>> >>> Cheers, >>> Ronni >>> >>> 17" MacBook Pro 2.3GHz Quad-Core i7 “Thunderbolt" >>> 2.3GHz / 8GB / 750GB @ 7200rpm HD >>> >>> OS X 10.9.4 Mavericks >>> Windows 7 Ultimate (under sufferance) >>> >>> >>> On 15 Jul 2014, at 12:20 pm, Jon Davison <jondcamera...@me.com> wrote: >>> >>>> Thanks Peter. I have started it in Safe Mode and it is fine, no horizontal >>>> lines, or crashing and the system >>>> seems stable. >>>> So what would this mean? is it a hardware issue then if the display is now >>>> okay? >>>> I have not restarted it in normal mode yet. >>>> >>>> Kind regards >>>> Jon >>>> >>>> >>>> On 14/07/2014, at 9:24 PM, Peter Hinchliffe <hinch...@multiline.com.au> >>>> wrote: >>>> >>>>> >>>>> On 11 Jul 2014, at 5:39 pm, Ronni Brown <ro...@mac.com> wrote: >>>>> >>>>>> Hi Jon, >>>>>> >>>>>> Could be graphics / logic board / hardware issue. Make sure the owner >>>>>> has a current complete system backup of this iMac. >>>>>> >>>>>> Have you tried booting the iMac in Safe Mode? >>>>>> To start up into Safe Mode (to "Safe Boot"), do this: >>>>>> >>>>>> 1. Be sure the computer is shut down. >>>>>> 2. Press the power button. >>>>>> 3. Immediately after you hear the startup tone, press and hold the Shift >>>>>> key. >>>>>> Tip: The Shift key should be held as soon as possible after the startup >>>>>> tone but not before. >>>>>> 4. Release the Shift key when you see the gray Apple and progress >>>>>> indicator (looks like a spinning gear). >>>>>> >>>>>> During the startup in Mac OS X 10.4 or later, you will see "Safe Boot" >>>>>> on the login window. >>>>>> >>>>>> Cheers, >>>>>> Ronni >>>>>> >>>>>> >>>>> >>>>> You could also try starting up with the Apple Hardware Test by holding >>>>> down the "D" key during startup (http://support.apple.com/kb/HT1509). >>>>> This will give you a chance to test the graphics support. >>>>> >>>>> Peter Hinchliffe Apwin Computer Services >>>>> FileMaker Pro Solutions Developer >>>>> Perth, Western Australia >>>>> Phone (618) 9332 6482 Mob 0403 046 948 >>>>> -------------------------------------------------------------------- >>>>> Mac because I prefer it -- Windows because I have to. >>>>> > > -- The WA Macintosh User Group Mailing List -- > Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> > Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> > Settings & Unsubscribe - > <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
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