After installing 10.6.8 will not boot even from 10.6 disk HELP

Will only start in safe mode, Safari crashes so no help there to get back to 10.6.7 and will not boot from my 10.6 SL disk. HELP! Can't find the orignal disks so I am in a bad way...

Call AppleCare and request replacement discs. You can also Zap the PRAM and Reset the SMC and see if those will fix things up. You updated to 10.6.8 w/o having a bootable backup/clone or Time Machine backup? Bad move, that.

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Tiger on a G5 will not boot even from the CD after PS failure

While the G5 was running, it has a abrupt power supply failure. Since it was just out of extended warranty, I bought a power supply and installed it. After pressing the power button, it only gets as far as the gray screen with the Apple logo. After a minute, the fans start on high. Trying to start on the CD, both Apple and Techtools, and the same happens. Safe mode and single user has the same effect, just to the gray screen with the Apple logo.
But when Command, Option, Shift, and Delete are held down, the screen tries to start with some text and then shows the "must restart" box similar to a kernel panic.
I can run the hardware test and the hardware checks out fine.
I tried unplugging the HD, re-setting teh PMU (if I did it correctly), and safe start. All with the same results.
Any ideas?
Thanks for looking.

This may be too little, too late for you, though I hope it's helpful, but maybe someone perusing this discussion might benefit:
My problem has been slightly different; my computer, after a few months of perfect operation has started to suddenly shut down.
No one has yet mentioned in this discussion that certain G5s have a hardware problem that Apple will fix for free. See:
http://www.apple.com/support/imac/repairextensionprogram/
and
http://www.apple.com/support/imac/powersupply/repairextension/
My G5 apparently qualifies for this repair. Now to see if my Italian dealer will honor it . . .
I HAVE POSTED THIS ELSEWHERE FOR PEOPLE WITH SIMILAR PROBLEMS
CIAO!

New iMac will not boot, even from disk and in Safe Mode

I'm stuck on the grey spinny screen.
Here's what happened:
I tried to share my Macintosh HD on my network, then, when it was finished, a whole bunch of errors popped up saying that I would have to reinstall. So I restarted, now it chimes and boots to the grey screen and is stuck there. I tried to boot from the CD, but it didn't work, I also tried to use the reinstall disk which didn't work either.

MashedPotato wrote:
Thanks for the help, All I had to do was fix the disk permissions.
I wasn't waiting long enough for it to boot from the disk.
Your welcome and thanks for the star. Yes it take longer to boot because discs are not as quick as disks.

After installing Mountain Lion, contacts will not sync

After installing Mountain Lion, contacts will not sync to iphone 3G

I have the same problem... but when i connect my MacBook Pro late 2009 on my cousin internet the facebook page works normaly. but when i reconnect in my wifi it stops to work again... and it only hapens with macbook pro, On my iPad, iPhone and PC the facebook page works properly. And another thing, when my counsins bring their Macbooks to my network, it stops to enter on facebook too... I already reset my router config everything and facebook dont work with anything with mountain lion... My router is a linksys wag200n and the problem started when i install mountain lion. Thanks for help and sorry for bad english xD.

HT4623 after installing ios7 my Iphone4 will not work

after installing ios7 my Iphone4 will not work

Try a reset: hold down the home button along with the power button until you see the Apple, then let go.

TS1367 my laptop will not boot up from the storage hard drive but if i remove it from the laptop and connect it as portable hard drive my laptop boot up normal?

my laptop will not boot up from the storage hard drive but if i remove it from the laptop and connect it as portable hard drive my laptop boot up normal?

Do you have a compatible OSX installed on this 'storage' HDD? If not, it will not boot your MBP.
Ciao.

Macbook pro will not boot even to grey screen ??

my macbook pro will not boot even to grey screen ?? Just stopped wprking after I closed the cover.

What other indications are there, does the white light turn on, solid or pulsing?, do you hear the startup chime, or bong if you prefer. Can you hear the drive, the fans?
More information from you will assist us trying to help you.

Will not boot up from DVD drive

HP pavilion slimline s3200n will recognize the DVD drive but it will not boot up from the drive

Hi,
Try hitting the escape button from boot up. It normally gives you the boot options where you can select the DVD drive.
If you can't get into the boot options, try getting into the bios with F10 and change boot order options.
Greetings
Philippe
Clicking the "Kudos star" to the left is a great way to say thanks!
When your problem has been solved, accept the solution by clicking the "Accept as Solution" button to help other members in the future!

IMac 27 inch i7 OSX Lion will not boot up from Hard Disc

iMac 27 inch i7 OSX Lion will not boot up from Hard Disc on cold start, and cannot find wifi hardware in the machine. Restart and everything is fine. I have two machine and they behave the same. Software or hardware problem?

First of all, try a hard restart; making sure no disks are in the slot, unplug everything from your computer (keyboards, mice, etc.) and then unplug the computer itself. Leave it unplugged for a minute or two, then plug it back in and boot it up.
If that fails, reboot it while holding down the option-key on your keyboard. The screen should show a choice of which disk drive to boot from. Choose your usual drive.
If that fails, reboot it while holding down the shift-key on your keyboard. It should take a while for it to boot up, as it is destroying all connections to sources that may contain a virus.
If that fails, reboot it while holding down keys "option-command-P-R" until you hear the startup tone a second time.
If that fails, reboot it while holding down the C-key. Make sure you have inserted the installation disk before doing this step.
If that fails, reboot it while holding down the command-key and the R-key.
If that fails, please reply to this and let me know.

After updating Airport software, Macbook will not boot

I see others have updated with the new Airport software without incident, but not me.
I just ran software update to install the Airport update (hoping it would cure the problem I've had -- and other users as well -- with the connection dropping every 5 minutes with Linksys routers [check the Airport discussion board for much discussion of this]).
After installing, upon restart my Macbook will not boot fully. I get the Apple symbol, then the spinning gear symbol, then a light blue screen and that's it. After a while the fan comes on.
Call it the light blue screen of death.
All was working fine until the update.
I have boot camp and I can boot into Windows.
I have tried removing the battery and resetting the PRAM. No help.
Sigh... Applecare is closed so I cannot call until Friday morning. Anyone have any suggestions of what I can try?
I have my Mac hard disk backed up from a few days ago using Super Duper on a USB drive but I am reluctant to try booting from it as I fear corrupting the drive. Unfortunately I don't have my Mac system CDs with me as I am away from home at the moment.
I just switched to the Mac 6 weeks ago after 3.5 years with a Dell laptop. Never had a single problem like this in all that time. But I still like my Mac.
PD

Well, I spoke too soon. Last night I was able to start up as described above, but this morning when I tried to start it did not even get to the Mac symbol. It just hung at a dark blue screen for several minutes.
Tried restarting with the shift key held down but it would not go into safe mode. Just the dark blue screen.
Resetting PRAM made it startup.
But I'm pretty nervous about this.
So, is there a way in Mac OS X to roll back to the system before the update? In Windows XP this is very simple under System Restore. I have the impression OS X doesn't have this feature and won't until next year with Time Machine.
And I see now I'm not the only user with this problem.
PD

After 10.5 upgrade Mac will not boot from hard drive

I just upgraded to 10.5 Leopard but my mac will not boot from the hard drive even after selecting my hard drive as the startup disk. The mac will start to boot but will cut itself off before the boot is complete. I have to leave the Leopard disk in the mac and hold down C to get the mac to turn on but it only allows me to install the software again.

instead of archive and install you might first want to try restoring your system using TM to some time point before your failed 10.5.1 upgrade. Then try upgrading to 10.5.1 again. I would suggest downloading the full 110 MB upgrade and installing it manually rather than doing it through the software upgrade menu.
You can download the upgrade here:
http://www.apple.com/downloads/macosx/apple/macosx_updates/macosx1051update.html

Hard drive detected but will not boot Windows Vista or recovery disk

Hi,
I have a very similar issue with a HP Pavillion a6355.uk, the hard drive kept crshing windows and then it finally just kept getting pass the HP boot menu options, and then all I get is the DOS "@press ctrl+alt+del to restart".
The hard drive is detected and passes all the tests, after pressing F9, going into the F10 options. F11 does not do anything, so cannot recover windows/the system.
I have tried changing the SATA connections on the motherboard, no difference. I tried the recovery boot disk I created when it was working and it will not boot with the old or new hard drive I bought to replace it (same size and compatable).
I cannot find where to partition the new hard drive or format the c: on the old one (it had D: for the recovery, but as it won't boot, cannot access this).
I have also tried the HP website to dowload the drivers for the new one, but the page does not load up to show any drivers or Windows to download.
http://support.hp.com/gb-en/product/HP-Pavilion-a6300-Desktop-PC-series/3644673/model/3671505/driver...
The next page just keeps looping or not proceeding when I put in details.
I can’t find anywhere to get hold of my copy of windows vista for this PC or get a disk to re-install on a new drive or fix the old detected drive, can someone please help!!

Just what size HD and is the drive Sata II or Sata III?
Vista 32bit .iso You must have a valid installation key, which should be on the COA sticker on the computer, to activate the installation once it completes. ImageBurn to create the .iso disk. Driver page Vista (not 64 bit)
I am a volunteer. I am not an HP employee.
To say THANK YOU, press the "thumbs up symbol" to render a KUDO. Please click Accept as Solution, if your problem is solved. You can render both Solution and KUDO.
The Law of Effect states that positive reinforcement increases the probability of a behavior being repeated. (B.F.Skinner). You toss me KUDO and/or Solution, and I perform better.
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I want to wipe iBook of it's content, but it will not boot up from DVD

Can someone tell me how I clear off the content of iBook and install the basic set of the applications? I have the original OS 9 disks but they will not boot up with these. I have gradually upgraded the OS so I don't have disks to match 10.4.11.
I want to give this away, as I bought new MacBook Pro recently and I have all of the files on the new computer, (and on another hard drive).
Thank you for any help from out there.

No problem; I usually answer good questions already solved. (It's for the search engine.) Here's how to wipe a corporate or government ATA hard drive.
Should you be concerned about spies, industrial and foreign, or even you own personal information, there is a standard method of erasing ATA disks that contain government classified information. Most ATA disks have it built in (and is a concern when purchasing computers for classified research). It's extreme, but sometimes necessary: information otherwise remains stored on 'bad' blocks, &c.
At one time, only the DOS program HDDerase activated the secure erase in ROM. For Mac users, the Linux program 'hdparm' (which has other uses) will do this from a Live Linux distribution on CD (unless you can boot a USB Flash Drive).'Darwin' might have it.
How to Nuke an ATA Hard Drive
http://ata.wiki.kernel.org/index.php/ATASecureErase
Note that, if you stop the process part way though, the disk may not be usable again (except to spies). Also, nothing is guaranteed.
If Darwin doesn't have it, or if it doesn't work, LiveCD distributions, such as Mint, Berry, & those of major distributions can be found here:
Linux Release Watch
http://distrowatch.com/

V3-5727105 will not boot up from HDD or from Recovery CD.

4 weeks ago when I switched on my laptop I got a blue screen message during start-up saying a problem had been encountered and it needed to restart to try to fix the problem, then just a dark grey screen and nothing.Laptop is only 7 months old. Contacted Tech Support and they stated I needed Recovery CDs and provided me with a set after I paid £60.Tried to boot from Recovery CD and got Acer Recovery Management to load, but after selecting restore to factory settings the laptop entered into a never ending cycle of 'analysing HDD' , attempting to fix HDD'.Left the laptop running for 12 hours and that was the only two messages I saw on the screen.No option to 'exit as problem encountered' so I had to power down my laptop to escape the 'loop'.Tech Support now wants me to try to format my HDD by taking my laptop to a local PC repair shop.Why am I being asked to do all the diagnosis work on a 7 month old PC? Surely it should be fixed under the manufacturers warranty?Could someone please explain what trying to format my HDD will show?Thanks

Update ..... My laptop would not boot up from the recovery disc as it turned out the hard drive required to be re-formatted to clear the fault. I was told by the PC Repair company that no matter what I tried I would not have been able to fix/clear the fault. Given it appears to have been a software corruption issue, after reading the Acer Warranty I have found out that I have to pay for the repair as the machine hardware remains in g.w.o. and the laptop is back in full working order once again. The PC Repair man did say however that if I had phoned him first instead of Acer Technical Support, I would not have needed to pay Acer for the set of Recovery discs as he would have provided a fresh installation of Win 8.1. at a fraction of the price! Lesson learned.

After installing mavericks, the iMac will not wake from sleep properly (at all)

I've upgraded to 10.9 (late 2012 21" iMac), and I notice in the morning when the iMac has been sleeping overnight, it will not wake up,
During the day, if it sleeps for a few hours, it seems fine, and wakes normally, prompting me to type my password,
In the morning however, I hit a key (on my wireless keyboard), and the display wakes up, I get a dark grey screen, and see the loading circle (not the beachball) in the middle, and see the cursor for a few seconds, before it then disappears, and reappears.
This cycle repeats itself,
The 'fix' is to do a forced shutdown by holding the powwer button until it shuts down, and then restart.
Anyone else find this problem/find a solution?

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Test while in safe mode. Same problem? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

After installing 10.6.8 will not boot even from 10.6 disk HELP

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