Apple Event: May 7th at 7 am PT

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Level 1

2 points

OS X Yosemite keeps rebooting on start up

Hi everyone, I have an early 2011 mac book pro and I upgraded it to OS X Yosemite 5 days ago, first few days was problemless, but I experienced lots of problems starting from today.

Today my Mac shut down all of a sudden, and when I tried to reboot it, it displayed garbled graphics with weird colors and progress bar and apple logo was all garbled. I waited to see what was going to happen, after reaching the half of the progress bar, screen went grey and in 10 seconds, mac rebooted itself and same events took place over and over.

I tried command + option + r + p trick, it didn't help, I had bootcamp installed, I tried pressing option after chime and starting windows 7, it didn't help either. I tried to reboot in recovery mode, progress circle kept turning, then screen became blue, fans started to work really loudly. Then I had to turn off using the power button.

The only combination that allowed me to turn on my macbook pro is command + r, after progress circle turns for a bit, screen becomes blue, despite all the fans working really heavily, if I wait for a minute and turn off the machine by using power button and turn on again, mac starts without a problem, I don't see any garbled graphics whatsoever. I don't know why it works that way, But If I shut down, and power up again, same garbled graphics show up, this is really annoying, to make my laptop work, I need to turn it on and off 2 times. I verified disk with disk utility. It looks fine. Does anybody have this issue, what else can I try? I would really appreciate if you share your thoughts on the issue.

MacBook Pro, OS X Yosemite (10.10)

Posted on Oct 28, 2014 1:17 PM

49 replies

Apr 18, 2015 7:27 AM in response to cvalentiner7

I updated to 10.10.3 several days ago, and at first it worked fine, but when I launched the new Photos that's when my rebooting troubles began. First it rebooted itself, loaded the whole system, relaunched photos, and then rebooted again, then it progressed to rebooting about half way through boot. Target disk mode worked so I managed to back everything up, and recovery mode verifies the disk fine, yesterday I tried reinstalling Yosemite (but not erasing the drive first), and that didn't fix it either. Over the last few days it's varied between rebooting partway through booting, and freezing during boot.

I've reset the SMC and NVRAM, a couple of times yesterday it managed to make it through the boot sequence, the first time it froze and then rebooted moments after the login screen popped up, the second time I made it through the login screen and it began loading the finder before spontaneously rebooting. Disk Utility in Recovery Mode indicated the S.M.A.R.T. status of the drive was fine.

From this thread I tried the solution linked by tizmagik: https://www.afp548.com/2015/01/14/when-yosemite-has-fallen-and-it-cant-get-up/, but that didn't work for me either — still hangs or spontaneously reboots. I haven't seen any graphical glitches throughout any of this. Verbose mode has some warnings: “warning: couldn't block sleep during cache update", "warning: proceeding w/o DiskArb", and “AppleLMUController::smcReadKey received error 0x84 when reading key 'ALRV'.” I don't know what is relevant...

My computer is a bit older than most of the other complaints, a mid-2007 15" MBP, 2.2GHz with 2GB ram and a 160GB hard drive.

Pralaya

Level 1

8 points

Apr 25, 2015 7:26 AM in response to buddobbird

Turning OFF FileVault fixed the reboot problem for me.

Thank you.

Hello. I bought a new MacBook Air 13" (early 2015) few days ago. As soon as I turned it on, Mac OS X asked to activate FileVault during the configuration process.

I agreed.

I checked for update after few minutes finding 10.10.3 was available.

I download it through the App store.

At the first automatic reboot of the system after the OS patch installation it rebooted twice, without finishing the first bootstrap.

Since then sometime it reboots twice without finishing the first boot process or while I'm logging in.

I disabled FileVault as suggested here and so far it worked, also without encryption the system is much faster during the bootstrapping procedure.

Problem is I cant tell if it has been 10.10.3 to cause the problem or not, because I basically didn't restart neither on time the OS without this patch.

Thank you everyone, for helping each other.

May 11, 2015 11:34 AM in response to earikan35

I finally took my MBP to the local Apple reseller here. They ran a diagnostics and decided the motherboard needed replacing. This was done under extended warranty. It is now back, reinstalled and working like before...

Aug 26, 2015 1:29 AM in response to earikan35

We've just had our early 2011 MBP repaired under the Apple Repair Programme that deals with this. However, 2 weeks in and the screen is starting to do the old scramble routine followed by a random re-start!

Everyone one insists its nothing to do with Yosemite... and reason tells me it's hardware and not software that's the issue... but since 'upgrading' to that OS things have not been the same.

Disappointing and frustrating.

OS X Yosemite keeps rebooting on start up