Let me know how I can help further. The initial gray screen will show icons for your normal hard drive and a Recovery Partition. Click on the Recover Partition and boot up. Once you get to the desktop, a box will appear that gives you several options.
Click the option to launch Disk Utility. In the main portion of the window, click the Erase button. In the Erase window, click on the Security button, and click the option to zero all sectors, then click the OK button. Now click the Erase button to erase the hard disk. Clicking the zero all sectors option not only writes zeros over all your data, it also checks the entire disk surface for unreliable sectors.
OS X I got the message that my drive seems to be okay, yet the reboot sends me again to endless gray screen. The Safe Boot disables any third party software that normally loads at boot up, but more importantly it rebuilds the Launch Database on your hard disk. Rebuilding the Launch Database frequently resolves the problem of the gray screen. Turn off the Mac.
Then start it up while holding down the Shift key. Continue to hold down the Shift key until you see a status bar at the bottom of the screen, beneath the gray Apple and the spinning gear. Then release the key. Your Mac will always boot to the login screen when doing a Safe Boot, even if it normally goes directly to the desktop. Once you get to the login screen, simply restart one more time, this time without holding down any keys.
All of us carry disk repair programs with capabilities far beyond those built into OS X. However if you want to continue to try to fix this yourself, there are commercially available disk repair utilities that do a great job. My favorite is Disk Warrior from Alsoft http: If that fails, your drive likely need to be recovered rather than fixed, and at that point you really need to get a Mac professional like Everything Macintosh involved. Any ideas?
Did you see the gray apple, then get the kernel panic? To figure out which, try Safe Booting…start your computer, and as soon as you hear the startup chime begin holding down the Shift key on the keyboard. That does two things: Both of those things are beneficial. A safe boot takes longer than a normal boot because of the rebuilding of those databases, so keep holding down the Shift key until you see a status bar appear at the bottom of the screen OS X If you get to the login window, log in by entering you password.
When you get to the desktop, simply restart normally without holding down any keys. If you now boot up normally, the problem was likely with the launch databases, and the safe boot resolved it by rebuilding them. Enable each piece of third party software one-by-one, rebooting after each one is enabled to see whether the newly enabled piece of software causes the panic.
If you need further help you can contact us for remote, phone, or email support. Hope this fixes things, though. I completed each step as suggested above. When it came time to reboot it went to the gray apple screen with the loading wheel. My computer continues to stay on this screen without any progress. Do you have any other suggestions? For my answer, look at this reply I gave to Brendan on September I was able to log in single user mode. I did fsck -fy 3 times until it said the disk was ok. I was able to navigate and see my files still there.
I then tried to reboot and still went to just the gray screen. I get the progress bar, apple and spinning cog. Then it just goes to a blue screen. I never do hear the startup chime. No idea what to do now. The next step is to try a Safe Boot. Begin with your Mac turned off.
Start up your Mac, and immediately after you hear the startup tone begin holding down the Shift key on the keyboard. The bootup will take longer than usual because the Safe Boot does two things. First, it disables any third party software that normally loads at startup. Second, and more importantly in this case, it rebuilds critical databases on your boot hard drive called Launch Databases. Keep holding down the Shift key until you see a status bar appear on screen below the gray apple and spinning gear.
Once you see the status bar, release the Shift key.
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Even if your Mac normally boots directly to the desktop, when you Safe Boot it will go to the login screen. Enter your password, and go to the desktop.
SIngle User Commands
Then simply reboot normally. Start with your Mac powered off. Press the power button, and when you hear the startup sound hold down the Shift key on your keyboard.
Continue to hold the shift key until you see the gray screen with the dark gray apple, and, at the bottom of the screen, a status bar. As soon as you see the status bar you can release the Shift key. Booting up will take longer than usual because the Safe Boot rebuilds the Launch Database, an important file on your hard drive. When that file becomes damaged occasionally , it can prevent booting up.
Let us know if we can be of further help. My Macbook with Mountain Lion will not boot either. Rebooted and the first time it did boot successfully but then locked up. Did those steps again and each time got Disk appears to be OK. But it gets hung up at the gray apple logo screen with the fan spinning fast. This drive is a 1Tb drive I added after my first driver failed. I am wondering if I need to try Disk Warrior? Any suggestions would be most helpful! Rebuilding the Launch Database frequently resolves the problem of getting stuck at the gray screen with the Apple.
OK, so I do that and get the status bar, it goes through that step but hangs when the status bar goes away and the spinning gear starts. It spins for about 30 seconds then stops and thats as far as it goes….
How to Find a Disk ID & Device Node Identifier in Mac OS X Command Line
My computer shuts off before booting into the OS. Tried running fsck and got this…can anyone make sense of it? Also, is there any way to restore the OS formatted for all I care without a disc.. Checking extents overflow file. Checking catalog file. Invalid sibling link 4, Rebuilding catalog B-tree. Disk full error The volume Macintosh HD could not be repaired. Lack of free space is also one reason a computer runs very slowly.
You either need to replace your internal drive with a larger one using a disk copying program like Carbon Copy Cloner or SuperDuper! I was able to delete my downloads folder which allowed an fsck to run!
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To do that, restart your Mac while holding down the Option key. A gray screen will appear with icons for all the bootable disks available to your Mac. Under OS X Either double-click on it, or use the cursor keys on your keyboard to highlight it, then click the Return key to boot from it. Upgraded to mavericks nothing but pain. Followed advice above. Keep getting incorrect number of thread records. Typically, the initial release or two of any software has issues. They find the technical bugs well enough, but not the usability bugs.
Once the new release becomes available to everyone, the earliest adapters become the guinea pigs that get bit by the usability bugs.
That gives plenty of time for the developer to release several updates to correct issues, and in the case of OS X gives the third party developers enough time to develop stable updates for their programs to run under the new OS. Sorry you had the problem. I usually consider fsck, which uses the same disk repair routines as Disk Utility, as the most basic of the disk repair utilities, and also the one least likely to result in any unexpected data loss after the repair is complete.
Disk Warrior is much more comprehensive, and not only repairs many more directory issues than fsck, but also creates a brand new, optimized directory for the hard disk that should run more efficiently than the older, fragmented directory. TechTool Pro is my third choice, and checks and repairs some issues than neither fsck or DiskWarrior do.
Running fsck from Single User Mode
With recovery, normal or safe mode no matter what i use, my computer sits in the grey screen, with an apple logo, and the spinning circle, but then it freezes and then restarts automatically. Release the Option key when you get to a gray screen with icons for all bootable disks currently available to your Mac. Either double-click on the Recovery Disk to boot your Mac from that disk, or use the cursor keys on the keyboard to highlight that icon, then press the Return key to boot from that disk.
Hello, thanks for all the tips.
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