Cannot Boot after software update!

I just updated to the latest Mac update and after restarting it would not boot! The white screen appears with the loading bar for a few seconds (approx 15) and it restarts again, and it keeps on happening on and on again.
I tried using the Disk Utility (via installation DVD) to Repair my Mac HD but with no avail, it even says my HD is apparently OK. Then I came across something saying to delete all Cache maybe that helps (which made sense at the time because I had a Dock problem a few days ago and deleting the Cache fixed it) so I did.. and for some reason now I can't even use Disk Utility anymore.. it won't read my Keyboard shortcuts (pressing C during startup does nothing, so as any other shortcut I've tried [cmd+s, cmd+v, shift])
Please help! I need my laptop urgently!

kamasheto wrote:
I just updated to the latest Mac update and after restarting it would not boot! The white screen appears with the loading bar for a few seconds (approx 15) and it restarts again, and it keeps on happening on and on again.
I tried using the Disk Utility (via installation DVD) to Repair my Mac HD but with no avail, it even says my HD is apparently OK. Then I came across something saying to delete all Cache maybe that helps (which made sense at the time because I had a Dock problem a few days ago and deleting the Cache fixed it) so I did.. and for some reason now I can't even use Disk Utility anymore.. it won't read my Keyboard shortcuts (pressing C during startup does nothing, so as any other shortcut I've tried [cmd+s, cmd+v, shift])
Please help! I need my laptop urgently!
Welcome to Apple Discussions.
Reboot into the Safe mode - hold down Shift on reboot. At the login screen click restart.
This will clear caches and run fsck on the HD.
See if the system reboots normally after this.

Similar Messages

Leopard USB install no longer boots after software update

Hi all,
I have recently installed Leopard onto a USB partition in order to perform maintenance on my main Leopard installation. Installation proceeds without a problem however after downloading software updates the USB partition will not boot successfully, despite there being no problems with the disk / volume structures / apparently anything at all. In desperation I also tried to install Tiger, which worked, however I have the same problem after updating - it will not boot! I don't think my hardware is at fault - Techtool Pro tells me all is in order.
Has anyone had this problem and if so, how did you fix it?
Thanks,
Jason

I just installed Leopard onto a USB 2.0 external hard drive for a dual-boot. It booted fine at 10.5.1 but is taking ridiculously long to boot after 10.5.2 (I just got it to finally boot after the update while waiting more than 40 minutes!).
It seems that you may want to attempt booting several times - maybe turning off the machine in between or booting to the internal OS first and then to the external. Can't help you much beyond that as this is my introductory experience with this mess.

10.6.8 won't boot after Software Update

I've installed 10.6.8 via Software Update and the Macbook Pro will not boot, causes a kernel panic. It will boot in Safe Boot however. I've tried installing the combo update as well, no change. Verify disk permissions, no change. Help!
panic(cpu 2 caller 0x2abf6a): Kernel trap at 0x0029f24f, type 14=page fault, registers:
CR0: 0x8001003b, CR2: 0x7aae9000, CR3: 0x00100000, CR4: 0x00000660
EAX: 0x7a6fe06c, EBX: 0xec835381, ECX: 0xfcf7b1e9, EDX: 0x7aae8ffd
CR2: 0x7aae9000, EBP: 0x820ebd18, ESI: 0x00000000, EDI: 0xec835381
EFL: 0x00010202, EIP: 0x0029f24f, CS: 0x00000008, DS: 0x00000010
Error code: 0x00000002
Backtrace (CPU 2), Frame : Return Address (4 potential args on stack)
0x820ebb18 : 0x21b837 (0x5dd7fc 0x820ebb4c 0x223ce1 0x0)
0x820ebb68 : 0x2abf6a (0x59e3d0 0x29f24f 0xe 0x59e59a)
0x820ebc48 : 0x2a1a78 (0x820ebc60 0x0 0x820ebd18 0x29f24f)
0x820ebc58 : 0x29f24f (0xe 0x20650048 0x820e0010 0x2a0010)
0x820ebd18 : 0x8255448f (0xfcf7b1e9 0xec835381 0xfcf7b1e9 0xec835381)
0x820ebd58 : 0x82556ef9 (0x588ffd 0x81fcf7b6 0x8255bab0 0x53c996)
0x820ebe18 : 0x543f60 (0xc654100 0xbefdf00 0x1 0x506b76)
0x820ebe78 : 0x542137 (0xbefdf00 0xc654100 0x5e5209 0x1)
0x820ebf28 : 0x5426e9 (0xbefdf00 0xc5873c0 0x0 0x516766)
0x820ebf78 : 0x5443d5 (0xbefdf00 0x0 0x820ebfac 0x1)
0x820ebfc8 : 0x2a179c (0xc61ff90 0x0 0x2a17ab 0xc467000)
      Kernel Extensions in backtrace (with dependencies):
         com.metakine.handsoff.driver(1.2.4)@0x82551000->0x8255ffff
BSD process name corresponding to current thread: kernel_task
Mac OS version:
Not yet set
Kernel version:
Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
System model name: MacBookPro6,1 (Mac-F22589C8)
System uptime in nanoseconds: 1576987135
unloaded kexts:
(none)
loaded kexts:
com.metakine.handsoff.driver    1.2.4
com.apple.driver.MaxTranserSizeOverrideDriver    2.6.1 - last loaded 1338933558
com.apple.driver.AppleUSBTCKeyEventDriver    201.6
com.apple.driver.AppleUSBTCKeyboard    201.6
com.apple.iokit.SCSITaskUserClient    2.6.8
com.apple.BootCache    31.1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
com.apple.iokit.IOAHCIBlockStorage    1.6.4
com.apple.driver.AppleFWOHCI    4.7.3
com.apple.driver.AppleSmartBatteryManager    160.0.0
com.apple.driver.AppleUSBHub    4.2.4
com.apple.driver.AppleEFINVRAM    1.4.0
com.apple.driver.AppleAHCIPort    2.1.7
com.apple.driver.AppleUSBEHCI    4.2.4
com.apple.driver.AppleUSBUHCI    4.2.0
com.apple.driver.AppleACPIButtons    1.3.6
com.apple.driver.AppleRTC    1.3.1
com.apple.driver.AppleHPET    1.5
com.apple.driver.AppleSMBIOS    1.7
com.apple.driver.AppleACPIEC    1.3.6
com.apple.driver.AppleAPIC    1.4
com.apple.driver.AppleIntelCPUPowerManagementClient    142.6.0
com.apple.security.sandbox    1
com.apple.security.quarantine    0
com.apple.nke.applicationfirewall    2.1.12
com.apple.driver.AppleIntelCPUPowerManagement    142.6.0
com.apple.iokit.IOSCSIBlockCommandsDevice    2.6.8
com.apple.iokit.IOUSBMassStorageClass    2.6.7
com.apple.driver.AppleUSBMultitouch    207.7
com.apple.iokit.IOUSBHIDDriver    4.2.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice    2.6.8
com.apple.iokit.IOBDStorageFamily    1.6
com.apple.iokit.IODVDStorageFamily    1.6
com.apple.iokit.IOCDStorageFamily    1.6.1
com.apple.driver.AppleUSBMergeNub    4.2.4
com.apple.driver.AppleUSBComposite    3.9.0
com.apple.driver.XsanFilter    402.1
com.apple.iokit.IOAHCISerialATAPI    1.2.6
com.apple.iokit.IOSCSIArchitectureModelFamily    2.6.8
com.apple.driver.AppleFileSystemDriver    2.0
com.apple.iokit.IOFireWireFamily    4.2.6
com.apple.iokit.IOUSBUserClient    4.2.4
com.apple.iokit.IOAHCIFamily    2.0.6
com.apple.iokit.IOUSBFamily    4.2.4
com.apple.driver.AppleEFIRuntime    1.4.0
com.apple.iokit.IOHIDFamily    1.6.6
com.apple.iokit.IOSMBusFamily    1.1
com.apple.security.TMSafetyNet    6
com.apple.kext.AppleMatch    1.0.0d1
com.apple.driver.DiskImages    289.1
com.apple.iokit.IOStorageFamily    1.6.3
com.apple.driver.AppleACPIPlatform    1.3.6
com.apple.iokit.IOPCIFamily    2.6.5
com.apple.iokit.IOACPIFamily    1.3.0

Uninstall the Metakine software then do the following:
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
Quit the installer and restart. Now download the Mac OS X 10.6.8 Update Combo and update.

IMac Won't Boot After Software Update

First off, I'd like to say that this is not my computer, rather a friend's; therefore I don't know a lot of what happened before the install.
So, my friend said that he opened iTunes and got an update message. I asked him if he had ever updated his Mac since he got it (August 2010) and he said no. By the way he explained it, it sounds like when he pressed yes to update, it opened up "software update" and also updated some other things. He was asked if the computer can restart and he said yes.
When the computer restarted, it showed the usual Apple logo and spinning indicator. But, it also showed a loading progress bar. Now, I am not sure how far it went, he said about 50%, but it then shut itself off. When he tried turning it on again, it did the same thing.
Finally I showed up and after seeing that happening over and over, I called Apple. The employee told me to safe boot, PRAM, etc and nothing worked. Then I tried verifying and repairing the hard drive using the install disk but the computer got an error saying something like this: "cannot repair disk, try backing up and reinstalling..." The Apple employee told that the computer cannot be fixed and it either had to be "erased and reinstalled" or to try and get the data saved which would cost "hundreds or even thousands."
Is there any way to fix this? I'd really like to help him save all his pictures, documents, etc. Thank you!
PS: His computer is a 21.5" iMac (mid 2010 model). I believe it was running 10.6.

That's because the volume is too damaged to mount. Depending on how valuable the data is, you should either remove the drive and send it to a recovery service, which will be very expensive as you've been advised, or try one of the software packages that purport to be able to recover data from an unmountable partition. I have no experience with those products because I make backups. Maybe someone else here can make a specific recommendation.

G3 won't boot after Software Update

Thanks to XPostFacto, I've been successfully running Tiger 10.4.8 on my old beige G3, with the OS installed in the first 8 Gb partition. Works great.
To get more room for virtual memory and the system, I successfully installed 10.4 from the CD onto the larger partition on the same drive. It booted OK from that partition without changing the OS installed from the CD.
However, any Software Update run - followed by the required restart - seems to kill it. I've rebooted in 9.2.2 or from the smaller partition and run XPostFacto again, but nothing seems to get the updated system on the larer partition to boot up. All I updated was Quicktime and iTunes, not the OS. (I tried going to 10.4.9 last night but started over with a clean install today.) Right now I'm looking at the blue screen and spinning daisy.
Help! I don't want to be stuck at 10.4.0

>"To get more room for virtual memory and the system, I successfully installed 10.4 from the CD onto the larger partition on the same drive."
Hardware compatibility issues
Installing on a PowerBook G3, an original Power Macintosh G3, or an iMac:
If you install Mac OS X on a PowerBook G3 Series computer that does not have USB, an original Power Macintosh G3 (Beige), or a Rev. A, Rev. B, Rev. C, or Rev. D iMac, and the hard disk is larger than 8 GB with more than one partition, be sure to select a destination partition for Mac OS X that is completely within the first 8 GB of the disk.
Unless you have a PCI-slot ATA Controller or a PCI-slot SCSI card, you cannot expect to install OS X into the second partition and have it be reliable. Apple does not allow 10.4 to be installed on those older Macs, so the Installer may not check for the under 8 GB problem any more.
Mac OS X needs to be in the first under 8 GB partition. You can move your Home directories, many Applications, and OS 9 to another Drive, but not the basic system.

MacBook Pro will not boot after software update

MacBook Pro will not boot after doing an Apple Software Update (of course they will not help you). MONEY, MONEY, MONEY is the name of the game. They can cause your computer to crash and still charge you!
Does anyone have an answer to why my computer is showing a little gear spinning for hours? I have tried several things with NO luck.
Thanks-

Run through the list of fixes here
Step by Step to fix your Mac

OS X won't boot after software update

Last night software update showed a security update for OS X Tiger (think it's 10.4.11), which I installed and then used the 'shutdown' option.
This morning, I can't get my MacBook to boot up, nor will it boot into safe mode. I just get the grey screen and the spinning wheel.
Help!

You can keep trying fsck, it works sometimes.
Have you tried booting from the Install CD/DVD then after you choose your language, a Menubar will show up top, find Disk Utility and run it from there.
If that doesn't work, then your best bets are DiskWarrior from Alsoft...
http://www.alsoft.com/DiskWarrior/
Data Rescue II...
http://www.prosofteng.com/products/data_rescue.php
This last one would require another HD with plenty of space to recover to.
Unfortunately, Disk Utility & fsck can't fix all that much, and the only other Apple Options are erasing the HD, or installing OSX to a second drive, then using Migration Assistant to move stuff over to the new HD.

Macbook pro (snow leopard) will not boot after software update

I helped my mom buy a Macbook Pro for herself for Christmas. Today, I connected it to her old eMac and used the migration assistant to transfer files over. It was unable to estimate migration time on the only user (after 45 minutes) so I didn't migrate the user. Then I tried to pair her macbook to her new bluetooth keyboard, but no magic happened, so I tried to use the bluetooth setup assistant, which crashed. So I ran a software update, hoping that this would fix whatever the bluetooth problem is. Despite having updated on the 23rd, there were 4 updates. None seemed applicable but I installed them anyway. Now the computer won't boot at all.
Software update said that I had to restart for the updates to take effect, so I restarted. The harddrive went whirrrrrr and the grey screen with the apple logo and the spinning circle displayed. Then the harddrive stopped going whirrrr and 10 minutes later, I started looking on the support site for what to do. I found this:
http://discussions.apple.com/thread.jspa?messageID=10564149&#10564149
Per the instructions in the last post, I fscked the drive (although -f, in accordance with the fsck help). This found no problems. The next suggestion was to boot from the OSX install disk. Only one problem-- there was a disk in the disk drive when the problem occurred and the disk eject button apparently only works while in the gui. I can't install from disk if I can't get the existing disk out of the drive.
So, any other ideas on what I can do to get this machine to boot?
Message was edited by: jenlarkin

Hi Jen:
Since it's new, you're entitled to 90 days of phone support (3 years if you buy AppleCare). It sounds to me like you may have some hardware issue(s) going on - you should not have the sorts of issues you're having with a new Mac. Apple will probably be much better and faster about getting you fixed than this board may be able to if that is the case.

Safe boot after software updates

when i install updates from software updates and restart my mac mini, it always goes into safe boot mode. i then have to log in and restart. after restarting everything is back to normal. this problem has been happening since i did a clean install of leopard v10.5.1 and started installing apps.
3rd party apps: appcleaner, carbon copy cloner, cocoviewx, firefox, google notifier, google updater, logmein, maintenance, mozy, onyx, tinkertool and vlc.
3rd party pref panes: default apps, secrets and startup sound.
3rd party login items: google notifier, LMILaunchAgentFixer and mozy status.
thanks in advance for the help.

anikdan1 wrote:
when i install updates from software updates and restart my mac mini, it always goes into safe boot mode. i then have to log in and restart. after restarting everything is back to normal. this problem has been happening since i did a clean install of leopard v10.5.1 and started installing apps.
3rd party apps: appcleaner, carbon copy cloner, cocoviewx, firefox, google notifier, google updater, logmein, maintenance, mozy, onyx, tinkertool and vlc.
3rd party pref panes: default apps, secrets and startup sound.
3rd party login items: google notifier, LMILaunchAgentFixer and mozy status.
thanks in advance for the help.
Welcome to the Apple boards:
Try this:
Boot using the Verbose Mode - Hold down Option-V key combo on boot. If it still boots into safe mode you should see why.
Also after booting, in a terminal run
dmesg
you might need to run
sudo dmesg
and enter your password.
This will also "spill the beans" of what happens during boot.
One of these options should at least give you a clue why it's booting into the safe mode.

G4 PowerMac mirrored drives won't boot after software update

This IS NOT about my PB but a PowerMac tower, G4, mirrored drive....running 10.5 (I think).
After some month of neglect, did software update yesterday.... 7 programs including a security update, iTurnes, QT, and I'm not sure what else.
Now it won't boot.
I have a Disk Warrior CD, but I can't get the SuperDrive door open to try to boot from it.
Help GREATLY appreciated.
Thanks,
TD

After some month of neglect, did software update yesterday.... 7 programs including a security update, iTurnes, QT, and I'm not sure what else.
Now it won't boot.
What I like to call a case of computer indigestion. Too many updates at once. See recommendations below.
I have a Disk Warrior CD, but I can't get the SuperDrive door open to try to boot from it.
See if any of these help:
[Topic : Can't open drive door |http://discussions.apple.com/thread.jspa?threadID=1279497]
A dozen ways to eject or unmount a recalcitrant CD or DVD
http://www.osxfaq.com/dailytips/08-2002/08-12.ws
Ejecting media in Mac OS X: Removing 'stuck' CDs/DVDs
http://www.macfixit.com/article.php?story=20041011075232575
Power Macintosh G3 and G4: About the DVD-RAM Drive
http://docs.info.apple.com/article.html?artnum=HT3072
PowerPC-based Macintosh: How to eject a disc when other options don't work
http://docs.info.apple.com/article.html?artnum=106752
Force Eject (10.3 or later) - Can be used to eject any removable disk that the system will not eject. http://mac.softpedia.com/progDownload/Force-Eject-Download-34780.html
[Article #HT1310 - Startup Manager: How to Select a Startup Volume|http://support.apple.com/kb/HT1310]
In worst case scenario I wonder if sticking some tape to the door to get access to the drive itself, then using a straightened paperclip in the eject hole (do they still have those?) would work.
<HR>
Updating
Certain steps appear to minimize the risk of an update producing problems.
Number one is to make sure you have a bootable clone backup of your computer in case you do need to back out of it again. This is the only guaranteed way of not having to worry about the results of an update.
Some like to boot from their installer discs or an external backup and verify (and if necessary repair) their internal drives as well as drive permissions. This is done with Disk Utility. You can verify a drive while booted from the same drive but sometimes this produces spurious errors. Repairing a drive (if necessary) has to be done while booted from another disk. Permissions repair can, and is probably best, done when booted from your internal drive.
[Resolve startup issues and perform disk maintenance with Disk Utility and fsck|http://docs.info.apple.com/article.html?artnum=106214]
[Using Disk Utility in Mac OS X 10.4.3 or later|http://docs.info.apple.com/article.html?artnum=302672]
[Disk Utility's Repair Disk Permissions|http://docs.info.apple.com/article.html?artnum=25751]
You can also go to the step of booting into safe mode to do the install.
[Mac OS X: Starting up in Safe Mode|http://docs.info.apple.com/article.html?artnum=107393]
[What is Safe Boot, Safe Mode? (Mac OS X)|http://docs.info.apple.com/article.html?artnum=107392]
[Safe Boot takes longer than normal startup|http://docs.info.apple.com/article.html?artnum=107394]
I like to download the update onto my computer and install it from there rather than let Software Update do it. I know a few people who had problems with doing the update via software updater found a manual install to work.
Repair permissions again afterward.
It helps to only install one update at a time and to run the computer for a while to make sure it is behaving well.
The more cautious even like to unplug third party peripherals (see [comment by BDaqua|http://discussions.apple.com/message.jspa?messageID=9040746#9040746]).
Almost all of the above steps (except backup) have been questioned as to necessity because probably many people have done successful updates without doing them. I say they can't hurt, they can very likely do good (especially if your computer isn't regularly maintained), so why not do them to be safe.
[BDaqua's comments on updating problems|http://discussions.apple.com/message.jspa?messageID=8948595#8948595]
[Baby Boomer's comments on updating problems|http://discussions.apple.com/message.jspa?messageID=9025760#9025760]
[Klaus1's post on updating and removing updates|http://discussions.apple.com/message.jspa?messageID=10257902#10257902]

Froze and won't boot after software update

my brother was doing a software update when the computer seemed to freeze through the install. We're trying to boot it back up, but the only thing we get to is the white screen with the clicking circle thing. What can we do to get this up macbook and running again?

Just to be clear, your computer is frozen on the white screen with the Apple logo in the middle and a spinning gear below. If this is the case, try doing a safe boot first by pressing the shift button when you turn on the computer. If that doesn't help, then follow the steps on this previous thread:
http://discussions.apple.com/message.jspa?messageID=6763774#6763774

IMac G3 won't boot after software update

Graphite iMac G3, OS 10.4.11, 384 mb RAM - Ran software update yesterday 4/3/10 (security update & quicktime update). Walked away and came back to a blue screen with the mouse pointer and circular counter periodically appearing and disappearing (don't know if the update finished or if it crapped out in the middle of updating). Have tried safe booting - no good, zapping PRam - no good. Anyone have any idea what's going on and/or how to fix it?
Thanks

Hello HaxMonkey, and a warm welcome to the forums!
You really need to get yourself a copy of the Tiger Discs.
See Tom's, (Texas Mac Man), great info on where/how to find/get Tiger...
http://discussions.apple.com/thread.jspa?messageID=9755670&#9755670
Or Ali Brown's great info on where/how to find/get Tiger...
http://discussions.apple.com/thread.jspa?messageID=10381710#10381710
What may help is is DiskWarrior, you need the CD though.
http://www.alsoft.com/DiskWarrior/
But others that may work…
Drive Genius 2…
http://www.prosofteng.com/products/drive_genius.php
TechTool Pro 4…
http://www.micromat.com/index.php?option=com_content&task=view&id=31&Itemid=83

Imac stays at 50% during boot after software update

Hello,
i was updating my software when i needed to reboot my imac. Now, at 50% during installing the new objects, it doesn't happen anything anymore. how do i escape from this situation?
Thanks

As a general rule of thumb NEVER shut down down your system when it's in the middle of any install. That will corrupt the download and possibly corrupt OS X. The next time you re-boot when you hear the Start Up tone hold down the Option key and choose the Recovery Partition. Next choose In Disk Utilities and Repair Permissions at least 2x. Then exit DU and attempt a normal restart, if it works great. If it does not boot again to the Recovery Partition and then choose Reinstall OS X and let the system re-install. Your files will be left in tact. Once the install has completed exit and restart normally.
If these steps don't work your next step is an Apple Store for some help.

Macbook pro not booting after software update

Dear all,
Since two days ago my macbook pro hangs at the gray apple screen, the round circle keeps on turning. Kept it running for nights but it does not exit this status. I read on the internet that I could run it in verbose mode, that's what I did, see screenshot below. What do you recommend? This seems to be a hard disk issue. How can I boot up in safe mode and possibly recover the hard disk data? Any other recommendations?
Thanks,

Get your Mac to a Computer repair service, or do it yourself. You will need to put it in an external SATA reader, like I did. I recovered files via an older mac running Slow Leopard and copied files to it.
What I did:
1. You will have to remove the screws at the bottom of your Mac, in order to get to the HDD (or SSD, whatever you have).
2. You need to remove the HDD and put it in an external Case/SATA reader
3. Copy files from your HDD to another Mac
4. On that other Mac, go to Disk Utility (search in spotlight) and Erase as 'Mac OS X Extended (Journaled)'
5. Download Mountain lion on another Mac from the AppStore, and go to that Applications folder.
6. Right click on the downloaded file and select “Show Package Contents”. Go to “Contents” and jump inside the “SharedSupport” folder and you’ll find a file titled “InstallESD.dmg”. Copy this over to the desktop.
7. Plug in a USB flash drive to your Mac having at least 4GB memory. We highly suggest going ahead with an 8GB one just to be on the safe side.
8. Now open up “Disk Utility” and drag InstallESD.dmg from the desktop to the left-hand sidebar. Select the attached USB from left side and click on “Partition” tab.
9. Select “1 Partition” from the Volume Scheme dropdown menu. Choose “Mac OS Extended (Journaled)” from the left.
10. Now click on “Option” at the bottom. Select “GUID Partition Table” and press OK. Now click on Apply at the bottom right to start formatting.. (NOTE: This is will erase all data on your USB flash drive)
11. Once the drive has been formatted, click on “Restore” (it’s right next to where you clicked on “Partition in Step 5).
12. Choose USB drive you plugged-in in Step 5 as “Destination” with the InstallESD.dmg file as “Source”.
13. Click Restore and type in your password (if you have any). This will create the intended Lion bootable USB flash drive
14. Reboot your Mac with the USB drive plugged in. Hold the “Option” key on your keyboard when you hear the iconic OS X startup chime. You can now boot into your Flash drive from there.
15. Follow the on-screen instructions to install OS X , and after that, reboot
16. Format USB back to FAT in Disk Utility, copy your files from old PC to new using the USB.
That's it, you're done . Takes a lot of time, but recovered my Mac this way!

System cannot boot after last update

I think that problem in display detection.
X server log file:
[ 26.434]
X.Org X Server 1.16.1
Release Date: 2014-09-21
[ 26.434] X Protocol Version 11, Revision 0
[ 26.434] Build Operating System: Linux 3.16.1-1-ARCH x86_64
[ 26.434] Current Operating System: Linux black 3.16.4-1-ARCH #1 SMP PREEMPT Mon Oct 6 08:22:27 CEST 2014 x86_64
[ 26.434] Kernel command line: BOOT_IMAGE=/vmlinuz-linux root=UUID=5db39538-f615-41e7-a67f-49b03b6a24be rw quiet
[ 26.434] Build Date: 21 September 2014 10:53:13AM
[ 26.435] (II) Module ABI versions:
[ 26.435] X.Org ANSI C Emulation: 0.4
[ 26.435] X.Org Video Driver: 18.0
[ 26.435] X.Org XInput driver : 21.0
[ 26.435] X.Org Server Extension : 8.0
[ 26.436] (EE) systemd-logind: failed to get session: PID 531 does not belong to any known session
[ 26.436] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 26.438] (--) PCI: (0:0:2:0) 8086:0122:1043:844d rev 9, Mem @ 0xfb400000/4194304, 0xb0000000/268435456, I/O @ 0x0000f000/64
[ 26.438] (--) PCI:*(0:1:0:0) 10de:0600:1043:8268 rev 162, Mem @ 0xfa000000/16777216, 0xc0000000/268435456, 0xf8000000/33554432, I/O @ 0x0000e000/128, BIOS @ 0x????????/131072
[ 26.438] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
[ 26.438] (II) LoadModule: "glx"
[ 26.438] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 26.447] (II) Module glx: vendor="NVIDIA Corporation"
[ 26.447] compiled for 4.0.2, module version = 1.0.0
[ 26.447] Module class: X.Org Server Extension
[ 26.447] (II) NVIDIA GLX Module 343.22 Thu Sep 11 15:55:13 PDT 2014
Is problem in xorg server or nvidia driver? I don't know what to do.

Trilby wrote:
The system certainly boots - you just cant start X it would seem.
What was updated? How do you start X? Is that the full log, it looks like it has been cut off?
Yes, system starts but I can only work through ssh. Here is the last full log:
[ 26.918]
X.Org X Server 1.16.1
Release Date: 2014-09-21
[ 26.918] X Protocol Version 11, Revision 0
[ 26.918] Build Operating System: Linux 3.16.1-1-ARCH x86_64
[ 26.918] Current Operating System: Linux black 3.16.4-1-ARCH #1 SMP PREEMPT Mon Oct 6 08:22:27 CEST 2014 x86_64
[ 26.918] Kernel command line: BOOT_IMAGE=/vmlinuz-linux root=UUID=5db39538-f615-41e7-a67f-49b03b6a24be rw quiet
[ 26.918] Build Date: 21 September 2014 10:53:13AM
[ 26.918]
[ 26.919] Current version of pixman: 0.32.6
[ 26.919] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 26.919] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 26.919] (==) Log file: "/var/log/Xorg.0.log", Time: Tue Oct 14 21:33:08 2014
[ 26.919] (==) Using config file: "/etc/X11/xorg.conf"
[ 26.919] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 26.919] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 26.919] (==) ServerLayout "Layout0"
[ 26.919] (**) |-->Screen "Screen0" (0)
[ 26.919] (**) | |-->Monitor "Monitor0"
[ 26.919] (**) | |-->Device "Device0"
[ 26.919] (**) |-->Input Device "Keyboard0"
[ 26.919] (**) |-->Input Device "Mouse0"
[ 26.919] (==) Automatically adding devices
[ 26.919] (==) Automatically enabling devices
[ 26.919] (==) Automatically adding GPU devices
[ 26.919] (WW) The directory "/usr/share/fonts/OTF/" does not exist.
[ 26.919] Entry deleted from font path.
[ 26.919] (==) FontPath set to:
/usr/share/fonts/misc/,
/usr/share/fonts/TTF/,
/usr/share/fonts/Type1/,
/usr/share/fonts/100dpi/,
/usr/share/fonts/75dpi/
[ 26.919] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 26.919] (WW) Hotplugging is on, devices using drivers 'kbd', 'mouse' or 'vmmouse' will be disabled.
[ 26.919] (WW) Disabling Keyboard0
[ 26.919] (WW) Disabling Mouse0
[ 26.919] (II) Loader magic: 0x818d80
[ 26.919] (II) Module ABI versions:
[ 26.919] X.Org ANSI C Emulation: 0.4
[ 26.919] X.Org Video Driver: 18.0
[ 26.919] X.Org XInput driver : 21.0
[ 26.919] X.Org Server Extension : 8.0
[ 26.920] (EE) systemd-logind: failed to get session: PID 543 does not belong to any known session
[ 26.920] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 26.921] (--) PCI: (0:0:2:0) 8086:0122:1043:844d rev 9, Mem @ 0xfb400000/4194304, 0xb0000000/268435456, I/O @ 0x0000f000/64
[ 26.921] (--) PCI:*(0:1:0:0) 10de:0600:1043:8268 rev 162, Mem @ 0xfa000000/16777216, 0xc0000000/268435456, 0xf8000000/33554432, I/O @ 0x0000e000/128, BIOS @ 0x????????/131072
[ 26.921] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
[ 26.921] (II) LoadModule: "glx"
[ 26.922] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 26.928] (II) Module glx: vendor="NVIDIA Corporation"
[ 26.928] compiled for 4.0.2, module version = 1.0.0
[ 26.928] Module class: X.Org Server Extension
[ 26.928] (II) NVIDIA GLX Module 343.22 Thu Sep 11 15:55:13 PDT 2014
[ 26.928] (II) LoadModule: "nvidia"
[ 26.928] (II) Loading /usr/lib/xorg/modules/drivers/nvidia_drv.so
[ 26.928] (II) Module nvidia: vendor="NVIDIA Corporation"
[ 26.928] compiled for 4.0.2, module version = 1.0.0
[ 26.928] Module class: X.Org Video Driver
[ 26.928] (II) NVIDIA dlloader X Driver 343.22 Thu Sep 11 15:34:47 PDT 2014
[ 26.928] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 26.928] (++) using VT number 7
[ 26.940] (II) Loading sub module "fb"
[ 26.940] (II) LoadModule: "fb"
[ 26.940] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 26.940] (II) Module fb: vendor="X.Org Foundation"
[ 26.940] compiled for 1.16.1, module version = 1.0.0
[ 26.940] ABI class: X.Org ANSI C Emulation, version 0.4
[ 26.940] (II) Loading sub module "wfb"
[ 26.940] (II) LoadModule: "wfb"
[ 26.940] (II) Loading /usr/lib/xorg/modules/libwfb.so
[ 26.941] (II) Module wfb: vendor="X.Org Foundation"
[ 26.941] compiled for 1.16.1, module version = 1.0.0
[ 26.941] ABI class: X.Org ANSI C Emulation, version 0.4
[ 26.941] (II) Loading sub module "ramdac"
[ 26.941] (II) LoadModule: "ramdac"
[ 26.941] (II) Module "ramdac" already built-in
[ 26.941] (WW) NVIDIA(0): The NVIDIA GeForce 8800 GTS 512 GPU installed in this system
[ 26.941] (WW) NVIDIA(0): is supported through the NVIDIA 340.xx Legacy drivers.
[ 26.941] (WW) NVIDIA(0): Please visit http://www.nvidia.com/object/unix.html for
[ 26.941] (WW) NVIDIA(0): more information. The 343.22 NVIDIA driver will ignore
[ 26.941] (WW) NVIDIA(0): this GPU. Continuing probe...
[ 26.941] (EE) No devices detected.
[ 26.941] (EE)
Fatal server error:
[ 26.941] (EE) no screens found(EE)
[ 26.941] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 26.941] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 26.941] (EE)
Thank you for your answer!

Cannot Boot after software update!

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