My MacPro won't Boot - stuck on White Screen - help?

I have a MAC PRO, it was asleep during a power outtage... Now when i try to restart the computer, it never boots - and gets caught in an endless white screen. I've tried to zap my PRAM, still nothing. I just ran out of my apple support, and they are telling me to bring it - is there anything I can do on my own to fix this without having to pay a fortune?

Google - your OEM DVD has AHT on its label
A storm can send too much juice down the modem line and fry the ethernet ports, as long as it is wired, does not need to be running - and sleep is still 'running.'
I consider UPS $200 to be worth investment - as much AppleCare and helps protect the PSU which costs more to replace. My modem had to be replaced (router seems okay) was $79.
CyberPower CP1500PFCLCD PFC Compatible 1500VA 900W Pure Sine Wave Tower UPS
http://www.amazon.com/CyberPower-CP1500PFCLCD-Compatible-1500VA-Tower/dp/B00429N 19W/
How to clone your system:
http://macperformanceguide.com/Mac-HowToClone-backup.html
http://macperformanceguide.com/Mac-HowToClone.html
http://www.macupdate.com/app/mac/7032/carbon-copy-cloner
http://www.macperformanceguide.com/blog/2012/20120711_2-MacPro-internal-clone-ba ckup.html

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Mac pro won't boot: stuck on white screen, HD is new

My HD crashed (I think). Mac pro stuck on white screen for a while, then it goes to a black dos-like screen that says "no disc to boot.
I switched out my HD (I tested on different laptops and it works) and inserted the Mac OSX DVD but now it's just stuck on the white screen. I can't eject my disc either.
I hear 3 VERY small beeps (not the same beeps that states ram is missing/corrupt, which are louder. My beeps are VERY silent).
Fan works
No apple logo, just all white
CMD + R doesn't work, C doesn't work, option doesn't work, shift + ctrl + option doesn't work either
I'm at a loss
Help?
Thanks!
Macbook Pro Mid 2010, stock OSX (not sure which one that is)

Hey jlee12489,
Thanks for the question, and welcome to Apple Support Communities.
The following article provides troubleshooting steps for a computer that is not starting as expected. It may help to resolve your issue:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/TS2570
Some of the steps included:
- Perform a Safe Boot
- Reset the NVRAM / PRAM
- Start from your Mac OS X Install disc; use Disk Utility
- Check your cables and power source
- Remove third-party RAM and internal hardware
- Perform an Archive and Install installation of Mac OS X
- Perform an Erase and Install installation of Mac OS X as a last resort
Thanks,
Matt M.

Won't boot stuck on white screen

I got an apple question for u before I schedule an appointment at the genius bar...my mid 2007 24" 2.8GHz intel core 2 duo 4 GB 1067 DDR3 iMac running 10.7.2 will not boot passed the white screen. It just keeps on spinning. I had to do a full erase and install and restored from Time Capsule backup. I can boot while holding the option key and it will allow me to boot to the Recovery HD which I ran disk utility and repaired permissions and verified disk, everything came back repaired and "Ok", I reset pram...All that is good but when I try to restart to the Macintosh HD it just spins on the white screen...any suggestions before I bring it in?
thanx

If you can get it to boot once the first thing you should do is backup all your data using Time Machine or better yet create a Bootable Clone using SuperDuper or Carbon Copy Cloner. What Apple says to do to trouble shoot is in Gray screen appears during startup.
I would also recommend running Apple Hardware Test in Extended Mode, if no errors appear the first time run the test 2-3 more times. Each Extended Mode test will take 30-60 minutes.

Upgraded imac to mavericks, now won't boot, stuck on white screen then reboots in a loop

i have a imac that i upgraded to mavericks, it wont boot up now, sticks on white screen for a while the reboots and sticks again, if i reinstall osx will it delete all my data- i tried to start the new install in recovery mode but it kep saying incorrect username and/or password, but i ts not incorrect and when i hit the forgot password link nothing happens

If you can get it to boot once the first thing you should do is backup all your data using Time Machine or better yet create a Bootable Clone using SuperDuper or Carbon Copy Cloner. What Apple says to do to trouble shoot is in Gray screen appears during startup.
I would also recommend running Apple Hardware Test in Extended Mode, if no errors appear the first time run the test 2-3 more times. Each Extended Mode test will take 30-60 minutes.

Macbook pro won't boot, stuck on white apple screen

Noticed today, that my macbook pro won't boot . It gets to the white apple screen with the spinner under the apple logo. It stays like this for a long time without doing anything except spinning.
I've powered down and tried to boot up several times.
I have boot camp and windows on my mac and when the white screen appears, I can press Option to bring up which hard drive and the Windows partition will load without any problems.

Exacty what happens when you try to boot up from the disc that came with your computer? Are you holding down the c key? Have you tried holding down the "option key?" Are you able to run the Hardware Test - Intel-based Macs: Using Apple Hardware Test
Shut down your computer and disconnect all peripherals (keyboard & mouse if pertinent) from your computer. Now reboot.
If the Mac starts up normally, shut it down again and then plug in one of the peripherals (keyboard or mouse first) and start up your computer again. If it does so successfully repeat the process, adding one peripheral at a time until your Mac acts up. At that point, disconnect the last peripheral you added, reboot your Mac and search the peripheral vendor's website for an updated driver.
If no driver exists or the problem remain after installing the new driver, try a different cable or a different port on your Mac.
If none of the above works, again disconnect all peripherals from your Mac, hold down the "shift" key to start up in "Safe Boot" mode.
If the Mac starts up correctly, restart without pressing the "shift" key.
If your computer still does not start up properly, shut it down and restart it while holding down the Apple+Option-P-R keys; keep holding "all 4 keys" down until you hear the startup sound "twice."
If none of the above work Disconnect all peripherals from your computer. Boot from your install disc & run Repair Disk from the utility menu. To use the Install Mac OS X disc, insert the disc, and restart your computer while holding down the C key as it starts up.
Select your language.
Once on the desktop, select Utility in the menu bar.
Select Disk Utility.
Select the disk or volume in the list of disks and volumes, and then click First Aid.
Click Repair Disk.
(If Disk Utility cannot repair, you will need a stronger utility (3rd party) - Diskwarrior or Techtool PRO)
Restart your computer when done.
Repair permissions after you reach the desktop-http://docs.info.apple.com/article.html?artnum=25751 and restart your computer.
Remove any 3rd party ram.
Reinstall Lion - This will install a "fresh" copy of Lion without archiving old system files but leaves the rest of your files in place.
If your computer is still under warranty or you have Apple Care, take full advantage of it by letting tech support deal with your problems. It's what you're paying them for.
Out of warranty - take the computer to an Apple store or an AASP. Whichever is more convenient for you.

Computer doesn't boot, stuck in white screen with Apple logo

I got a friend that has a MacBook 2.0GHz, Black. The computer had some sort of problem so he took out the HD and placed it into another computer (MacBook 2.2GHz, Black). For some reason whenever the computer boots, it gets stuck in the white screen with the gray Apple logo, and shows up a bar, as if it's loading some sort of firmware update. It never advances, and it doesn't go thru.
If he takes the same HD and puts it into an enclosure, first it would take a while to mount in another computer, and afterwards it would give some errors, but now it doesn't even load.
Before he had the issue with his original computer everything was working fine, and there was no update going on when the computer got broken. The problem that that computer has isn't related to the HD.

If you have physically removed the drive and connected it to another computer and it "took a while to mount" then it sounds like the drive itself is failing. Hopefully he maintains backups.
Boot the MacBook in "verbose" mode (press and hold down option+v while powering up)
http://support.apple.com/kb/HT1492
In this mode you will see all the boot messages scroll by instead of the typical white screen with Apple logo. You will likely be able to see messages indicating what the computer is trying to do -- for example messages indicating that having failures or retrying to read the hard drive.
The access arms on hard drives have to be precisely located above the "tracks" on the disk in order to read data. As the drive ages & wears, the accuracy of the arms can become sloppy, causing the read/write head to no longer be precisely located over a track. This results in failure to read correctly. Most drives have a useful life of about 5 years -- after which the failure rate will go up substantially. Fortunately, replacement hard drives are cheap.

Mac won't boot, stuck on grey screen if the external hdd plugged in

as the title.
if i plug my external drive, via usb port, the mac won't boot and stuck at grey screen.
unplugging it, the boot process will continue.
the hdd is a LaCie mobile hdd
any help?

Hello jason(?)
It's a LaCie external mobiel hdd, formatted as exFAT. without adapter. take power directly from usb port.
i tested it on my iMac and it works fine. boot up as normal. the only difference is my iMac is on 10.6.8 and my Air is on 10.7.2
I tested on both USB port on my Air and the problem still persist.
the read/write speed is normal (bought it like a day ago).
another thing is I don't have this problem with my external WD drive.
One thing to notice is that, I accidentally left like for like 2-3 mins and it boots. So why the question now is why it's taking so long to boot? normally it just takes <20 seconds. Seems like it tried to boot from the external hdd, doesn't it?

10.6 won't boot; stuck on grey screen

I know this is covered here to some degree, at least, but I haven't been able to find a complete solution/answer, so here goes:
(Please, redirect me to the right source of information, if you know where to look, but not before reading through my post. Thanks! Oh, and I'm no computer expert, so, please, bear with me.)
First of all, my equipment: 17" iMac (serial #: w86262cru2n, emc #: 2104), running (ran?) 10.6 (w/updates)
So, as my title says, my iMac won't boot up and gets stuck on the grey startup screen with the  and the spinning wheel. I can wait and wait, but it never gets past this point.
Here are some things I've tried (nothing has worked so far; "no success" = stuck on grey screen). These steps are also laid out here.
- Tried normal startup (no success)
- Tried Safe Boot (no success)
- Tried booting without connected peripherals (no success)
- Tried alternate outlet (power source) (no success)
- Tried resetting PRAM & NVRAM (no success)
- Tried boot from 10.6 Install Disk (no success)
- Tried replacing original RAM (no success)
- Tried mounting internal drive as Target Disk on my 10.5 MacBook (mounts fine; used 10.6 install disk to verify, says disk is "ok")
- Tried booting to MacBook via Target Disk (i.e. iMac is external drive connected by FireWire) (no success)
- Tried booting from cloned copy of 10.6 disk on an external USB drive (yes, this can be done; I've done it before). This drive was verified "ok" in the same way the internal disk was (see above). (no success)
My next step appears to be to erase the original internal HD and reinstall 10.6. This is where my my ignorance begins to rear it's head. Since I can seem to boot from the iMac, can I do this through my MacBook, viz. mount the original, internal, 10.6 disk on my MacBook and erase it and install 10.6 from there (e.g. through Disk Utility on the 10.5 MacBook)?
Assuming this is possible, can someone step me through the process?
Assuming this last step isn't possible, does this all point to a faulty logic board (sounds like a 'worst case' to me)?
Any ideas? Suggestions?
Many, many thanks, BTW, to all who have posted here and whose help I've availed myself of anonymously many times. And thanks in advance to anyone with helpful ideas.

Try a SMC reset and follow the steps again in the support doc for grey screen
https://support.apple.com/kb/ht3964
https://support.apple.com/kb/TS2570
Your 10.6 install disk seems unreadable if it won't "hold c or option" boot.
Clean the bottom with a alcohol and a very soft cloth and lightly polish until there is no streaks.
Don't touch the bottom or place the disk onto something that will mar the bottom.
If the disk still fails to work, get a replacement, as your going to need it. Get a jeweled plastic case for it.
To make copies of your Snow Leopard install disk, follow these directions.
http://www.walterjessen.com/make-a-bootable-backup-snow-leopard-install-disc/
Once you can hold c and boot off a working 10.6 install disk, simply reinstall OS X without using Disk Utility to Erase and Format the drive, this will replace the OS X installed (and bundled programs) with the disk versions, then reboot and immediately use Software Update to get current.
Your user files, third party programs will remain untouched, except for ones installed in OS X/root system files, those will have to be reinstalled with updated copies.
All else fails:
Grab a copy of your recent user file folders via FireWire target disk mode first or from a hold option bootable clone on a external drive
If you have to completely erase and reformat the drive, reinstall 10.6, there are some things you need to know.
1: The free iLife that came with your 10.5 install disks are not on the 10.6 retail disks
So to get that you need to select the drive makers name in Disk Utility, erase and install with the 10.5 disks first (warning, wipe entire drive)
2: Name the boot drive the same name as before in Disk Utility when formatting.
3: When you go through inital "Welcome to Mac" setup, use the same username as before, (different password)
4: Once in OS X 10.5 stick a working 10.6 installer disk in and upgrade. Once rebooted, immediately Software Update to current version.
5: Install programs from fresh sources next and update.
6: Finally, return the backup copies of your user file folders (Music, Documents, Pictures, etc., not Library) to their respective folders on the new configuration. Because you used the same hard drive and user name as before you should have little complications with things like iTunes song locations/playlists and other hard references to files on your drive.
By installing the OS first, then upgrading, then programs, then finally user files last, keeps the drive optimized as the drive is faster on the data installed first than data installed later. Since users files change size often, having them towards the end where they can grow or shrink keeps the performance of the computer up as much as possible for the OS and applicaitons. Eventually though with OS X updates it can get a bit more defragmented, but not much.

Mac wont boot, stuck on white screen

Hi
After doing a software update and restart, my iMac wont boot. It will chime on, Grey screen w/ apple logo, then flashes to a white screen with a larger loading dial. It will keep doing this over and over, never actually getting to the login screen.
Have done safe mode start-up, tried repairing disks, and reinstalling OSX, which it won't let me do.
Not a computer expert so wondering if there are any more things I can try before taking it into get repaired?
Thanks ahead of time!

Try booting from the install disc. A quick search should pull up the precise method for your particular iMac. If this started happening after and update, then it is likely something corrupted in your system software that may be an easy fix. Do you have an external backup drive you could boot from?

21" iMac stuck on white screen, help!

I have had my 21" iMac for about three months, it is brand new, not second hand and has never had any problems up until now. My iMac was running fine today, not a glitch or anything, but it was unplugged from the power socket and when I plugged it back in and turned it on, the power on sound played, then a white screen appeared with an Apple and spinning wheel. I left it on for SEVEN hours while I went out, came back and it is still not loading, so it has nothing to do with the speed of it. I ran the FSCK and it told me there were modifications made and that the Mac was okay. I rebooted it and the same thing happened. I can not use the installation disc because a) I can not find it and b) there is a disc in tere that will not come out.
Is there anything I could do before having to make an appointment with an Apple Genius?

I have rebooted and managed to reach the Recovery HD and used “Verify Disk” on the Macintosh HD and it said “The volume Macintosh HD appears to be OK.” so I ran the disk repair just in case. I then selected “Restart” from the Apple menu. It returns to the white screen with the Apple logo and the spinning wheel, but it is still not loading any further than that. Is there anything else I could possibly try?

G5 Power Mac won't boot past the white screen w/ the grey Apple logo

Ok trying this again. Thank you in advance for any help. My dual 2 gig proc power Mac froze during a movie. I shut it down restarted it but it hangs at the apple logo and the fans slowly build speed until it sounds like the box is take off for flight
What I've done:
No single user mode. I restart with cmd+s and it it hangs on the black screen w/ white lettering. The last thing it says is Dart enabled. There is a cursor box but it won't allow my to type anything
I can get into the open firmware mode and it works
I reset the nvram and the pram. I removed the battery and put it back in
I pulled all hard drives and attempted single user mode again nothing
I ran an apple diagnostic disc. All hard ware checks out fine. When I try to run the os diagnostic on the disc it hangs at the apple logo still
I rearranged the ram nothing going. Pulled all the ram and replaced one set at a time still nothing
Any ideas?

See if you can get it to run long enough to get/install some of these...
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
iStat Menus...
http://bjango.com/mac/istatmenus/
And/or iStat Pro...
http://www.islayer.com/apps/istatpro/
If you have any temps in the 70°C/160°F range, that's likely it.

Won't boot--stuck on grey screen...

...and I think I'm in trouble. Booted up with an external DVD drive and the installation disc, and successfully ran verify and repair disc and permissions. No change. Went to a link provided by a friend, and tried a monitored safe boot. Things progressed until I got here...
system/installatstartup/system/library/privateframeworks/networkconfig.framework /versions/a/resources/version.plist
...at which point it also said that the file or directory could not be found.
Am I correct in thinking my only choice at this point is to reinstall the OS?
Thanks in advance...

If your data is not backed up, you should attempt a data recovery*:
http://www.macmaps.com/backup.html
Otherwise, an archive and install of 10.4 from the retail 10.4 installer disc followed by a combo update from the appropriate 10.4 PowerPC combo update*:
http://www.macmaps.com/jaguarleopard.html
To bring you back where you were in the first place would solve the issue, if you have sufficient hard disk space. See my FAQ* on archive and installs:
http://www.macmaps.com/cleaninstall.html
- * Links to my pages may give me compensation.

Powerbook won't boot - stuck on blue Screen with rolling pin wheel

Hi, maybe someone could remove my current headache.
My old Powerbook G4 is stucked on a blue screen with an infinite rolling pin wheel(just after the little mouse arrow appears and disappears).
For the information:
- I already did all the possibilities on this page without success:
http://support.apple.com/kb/TS1411?viewlocale=en_US#symp1
- When I do Fsck in single user mode, it tells me that everything is fine with the HD
- I also checked techtool pro v4: everything is fine with the hard drive and files
- I can't start in safe mode
- I can't put my computer in Firewire target disk mode - the Fireware icon screen appears but it doesn't mount on my apple dekstop.
- I don't know where is my old PB G4 install disk, so I can't try that.
Message was edited by: NGrignon

I don't know where is my old PB G4 install disk, so I can't try that.
And, there in lies the solution. Without an OS disc to repair the OS you are up the creek without an OS disc.

Won't boot, stuck at blue screen

I have a problem with my MBP.
I was working on it just like every other day. While listning some music, at some point i lose all sound. Tried the headphones, ... Nothing worked. Next thing i was rebooting the MPB like normal (apple, reboot,...). While it was rebooting, i passed the gray screen with the apple logo and the little spinning thing. After that i got to the blue screen and was able to see the mouse point. But that's it. I'm not getting my login window, no menu, ...
Tried the Leopard disk, and repaired the disk. Repair was ok. Same result
Tried to repair disk permissions. Got all kinds of warnings about SUID-files (usr/libexec/load_hdi , ...)
If you guys want to, i can put a link here to a picture of the whole list of permissions failure...
Tnx for helping me!
Sam

Yes I have, and i couldn't find it.
I haven't got the time for waiting for an answer cause i really need this laptop. While i was going over other topics one told me to reinstall using Archive and Install. I just couldn't wait, so i took the chance.
I thought i was going to lose some stuff, or at least preferences like my Adium look. I put in the Leopard dvd, rebooted with the "c" pressed in and reinstalled it (using the archive and install option). The system rebooted again. I finally got back my login windows, logged in, and EVERYTHING was identical: passwords, preferences, maps, startup applications, even the alarm on my Awaken
Tnx alot for helping me Apple forums!
Sam

IBook won't boot, stops at gray screen--HELP

I couldn't find this exact topic at first glance and I am hoping someone can help me. My ibook is about 5 years old and has only really crashed on my once 2 years ago but I was able to reinstall the OS and go on my way. This time, however, nothing works. I tried to boot up yesterday and the gray screen appeared and that was it along with a strange buzzing sound. I tried Disk Warrior, wouldn't even boot off that. Also tried booting off system disk 1 and didn't get past the language screen, just hung up with that buzz again.
Does this sound like a logic board issue? Can it be rescued?
Thanks in advance for any help!

I'm not sure if the computer can be checked out at home in such a way
in its present state, to see if there is a logic board failure behind it, now,
or not. There could be a hard disk drive failure, or ATA controller failure;
and a short list of other possibilities, best checked over by a specialist.
Certain keyboard commands and things could be tried (and I usually
assume they'd been tried before asking here, but that's often not so)
just to see if one or more of them could get a rise out of the dead Mac.
Be sure, if you can get the installer disc to boot the Mac, that you
try and use the Disk Utility to repair disc; maybe more than once;
and do not try to just reinstall an Archive and Install. The HDD may
have corruption issues and it may need low-level zero-data and re-
formatting before a new system could go on there, if it worked at all.
{Even trying to reset PRAM/NVRAM and then seeing if you can get
the bootable OSX installer disc to start up the Mac could be OK.
Maybe that PMU reset, as a last resort? It probably won't hurt...}
A system on an external bootable enclosed hard disk drive could be
used by a tech or a prepared home-tech owner, and a clone of the
machine's system then attempted to be used to boot the ailing Mac.
If the optical drive and other components relying on the logic board
are dysfunctional due to a defect on that main board, most external
devices may also have a hard time trying to use these methods of
outside efforts to troubleshoot be nominally successful.
There may be a way a tech can use an second computer to get
data off the drive in your iBook, should it come to that, by using
the FireWire Target Disk mode and see if your iBook can start
and act like an external hard disk drive. A copy of the drive's
content or parts of it may be made by the second healthy Mac.
A clone (perhaps not bootable if data on it is damaged and not
recoverable) could be made if the second healthy computer has
a clone utility and also an external drive it can copy/clone the
iBook's drive content over to. This may be asking too much;
but the home user who has stuff on hand could do it shortly.
Anyway, there are some ideas online, if you can search google
and choose appropriate words; I looked but you may need to
read through several different source links to see if anything
sounds like it may work. re: iBook won't start past grey screen
Some users have tried resetting the PMU, others tried NVRAM
and PRAM; a few tried SafeBoot to see if the system was OK
enough to load in a reduced startup mode; maybe where the
system's own Disk Utility could be ran to at least fix permissions.
And of these, if it is truly a logic board or a failed hard disk drive,
they won't really do much. Probably no harm; and that is part
of what troubleshooting is all about, working with zeros and ones!
Good luck & happy computing!
edited to add a chapter.

My MacPro won't Boot - stuck on White Screen - help?

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