OS X :: MacPro Stuck In Endless Reboot

Oct 21, 2009

I installed a second hard drive, installed iphotomanager, merged some iphoto libraries onto the new drive and all was working fine. I changed some permissions ("unlocked" all of the drives as the merge was having trouble writing to the new drive but then it worked fine after I unlocked). Then I started getting the message again that it could not write to the iphoto library plist and the merging stopped working. So I thought maybe if i restart the computer, it would sort itself out but noooo, now it won't start.

It just starts to power up then you hear the drive die down. Tries over and over. So I took out the new drive I'd merged all the iphoto libraries on (which had been working fine until it didn't). But i suspect it had to do maybe with me changing permissions in the middle of the process maybe?

I tried restarting in safe mode, by holding down the shift key when I heard the start up tone until the grey screen with apple logo and spinning wheel appeared, and it takes longer now, but still ends up trying to restart and never gets to the login screen.

I have my Mac Pro installation disc 1 but can't find any others. I have Disk Warrior 4.0

But I can't get the disk drive to open since it won't start.

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IMac PPC :: G5 Stuck On A Reboot Loop

Jun 4, 2012

I received an iMac G5 from this old couple, they were going to throw it out, but all it needed was a power supply which I bought and replaced. It's been about 9 months and everything worked great, no problems whatsoever. 

Three days ago, I shutdown the computer and when I booted the next day, it would only reach the Apple logo and the spining wheel, the fans would blast loud and then it would shut down and restart again, repeating the same thing over and over.  I cannot start it under Safe Mode nor it recognizes the CD when booting. 

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Here's what I've tried with no success.
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3. Re-booting with the Snow Leopard DVD and using Disk Utility. I follow the necessary steps online. No luck

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Jun 10, 2012

I have a 6 month old iMac (bought Dec 2011). It has 10.6.8 with all patches. It began to randomly shut down and got stuck in the reboot loop (sometimes, the problem was a reawakening after sleep, but even a simple shutdown/restart wouldnt guarantee correct behavior). 

I did the Apple Hardware Test (it reported - no troubles found), reset the SMC, PRAM - all to no avail. 

Finally, i reinstalled the OS from the DVD that came along with the iMac. Left it for a few hours to download the "jumbo" patch from apple site, and now it is back to behaving the same way - it is stuck in a reboot loop! I dont know if it installed the patch or not, as soon as i touched any key to wake up the iMac, it rebooted (like before). And now I gotta try the boot process like 15 times and it may boot correctly. Safe Mode boot is also not guaranteed to work. It shows the sliding bar and then back to reboot! 

If it were a software issue, the reinstall of the OS should have fixed that? If it were a hardware issue, the AHT should have caught that? Am I stuck with a lemon? Just one of those bad pieces that are inevitable in any assembly line production? 

Info:
iMac, Mac OS X (10.6.8)

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[URL]
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Model Identifier:MacPro2,1
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