Questions about booting, the process of starting a computer and putting it into a state of readiness for operation.

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3answers
984 views

Monitor remains grey after Apple logo during boot on Mac Pro

The Mac Pro here (2008 model) started acting up as of yesterday during booting - when I turn it on, I hear the typical sound, the Apple logo appears, it disappears.. and the monitor remains in that ...
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2answers
1k views

Mac Mini not booting issue

I'm looking for some troubleshooting ideas on my mac mini failing to boot. The machine had been working fine until 3 days ago. I purchased the mini second hand from a friend ~ 4 months ago. The ...
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1answer
3k views

Constantly ejecting OS X install disc when trying to boot

When trying to boot from the OS X install disc (Snow Leopard) my Macbook will just eject the disc and boot normally from the installed system on the hard drive. Once booted, the disc can be read fine ...
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1answer
2k views

Mac Mini has loud fan, won't power up

My intel-based mac mini (Model A1283, EMC 2336) refuses to boot. When I plug it in, the fan spins up very loudly, but then nothing happens when I hit the power button. I don't get a boot chime, and ...
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1answer
1k views

Mac Mini won't boot. Is it the monitor or the Mac?

I just bought an old Mac Mini to start developing for iOS. The Mac Mini has a DVI port, so I connected it to my Dell 24" display which has a DVI connection. But it appears that my Mac wont boot. I ...
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1answer
3k views

MBP not booting, but HD seems fine

My late 2009 unibody MBP won't boot. I have already booted in single user mode, ran fsck -fy until I get no errors. But when typing 'exit' or rebooting in verbose mode I see, after fsck runs: Failed ...
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1answer
628 views

iMac wont startup and won't boot from CD

My 24" 3.06Ghz iMac will no longer fully boot. It constantly gives me the grey "Your machine needs to be restarted" half way through booting. At first I was able to boot into SuperUser mode and run an ...
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1answer
19 views

Boot from CD, make backup, reinstall snow leopard. Good idea?

My iMac has some problems, and to repair it I thought I'd do as it says in the title. Currently, I'm running (a broken) Snow Leopard, and ideally I'd make a backup (with Time Machine) before I erase ...
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1answer
43 views

OSX Froze, Fails to Boot in any Configuration

In the middle of working like a charm, my MBP locked up. After a bit, I did a hard power off. Here's the timeline since then Reboot. Got to user screen just fine, logged in. Applications all started ...
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0answers
31 views

MacBook Pro 13" 2011 not booting — question mark folder

My MacBook Pro is not booting. It only shows me a question mark folder. If I try to manually boot, it doesn't give me any options than to go into recovery. And if I go into recovery and then disk ...
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1answer
172 views

Unable to boot from USB Mac

I am running OS X 10.9.2 on a late 2011 Macbook Pro. I created a Windows 7 install usb using bootcamp successfully but the startup screen is not recognizing the usb on reboot. Please help. Note: I ...
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1answer
43 views

Will a MacBook with its lid closed (asleep) restart at the scheduled time?

I think the title says it mostly. Will a sleeping MacBook Air with the lid closed restart automatically at the time scheduled in the energy saver pane?
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0answers
43 views

Windows not booting off external disc drive

I'm trying to install windows xp on Lion. This is a little bit complicated, but I was using this tutorial. I got to step 6, which is booting from the Windows XP disc. But it says "no bootable medium ...
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2answers
391 views

OSX Partition won't mount. Permissions seem wrong

OS X was spinning and spinning when trying to shutdown so I held down the the ⌽ Power button to force shutdown. Current Situation: I cannot boot to OS X directly, I first have to boot to single ...
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1answer
69 views

MacBook will read USB drives with no problem, but will not see the USB drive as boot drive

I am trying to install OS X Lion on a Macbook 4,1 which I've upgraded to 4 GB of RAM. It should support this OS, however I cannot get my Mac to see the USB drive as a bootable option. It's a SANDISK ...
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0answers
255 views

Set EFI to boot Windows via (U)EFI one time

On my late 2012 Mac Mini, I have installed both Mac OS X Mavericks (with FileVault) and Windows 8.1 (natively, not via Bootcamp): /dev/disk0 #: TYPE NAME ...
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1answer
676 views

Partition corruption, still can see files in single user mode, would like to retrieve files

The problem started after forcing the mac to shutdown. Since then, when trying to boot, it stays stuck at the grey apple with spinning wheel. I've tried a few generic things to be able to access my ...
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1answer
64 views

Start a process at boot

I need dnsmasq to run at boot on Mavericks. I've got dnsmasq working fine. I've created a .plist file in /Library/LaunchDaemons with the following contents: <?xml version="1.0" ...
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0answers
111 views

WD My Book for Mac External HD won't boot any more

I bought a 3T WD My Book for Mac external HD and use it with my iMac with OSX 10.8.5. I partitioned it into 5 partitions. There are three 30G partitions and two larger ones. The largest is used as a ...
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0answers
385 views

MacBook Pro will boot only after a SMC reset

I replaced the hard drive in my MacBook Pro (mid-2010) with a SSD one. I installed Mac OS X 10.9. At first the installer wasn't able to find the new SSD drive, because of a error: "SerialATAPI device ...
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1answer
48 views

Why won't my Mac start?

I have a MacBook Pro 13 inch and something really weird happened. Earlier today it worked perfectly fine, a few hourslater I tried to turn it on and it was stuck at the startup. It has a little ...
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0answers
153 views

Cannot boot from external DVD

I have changed my internal DVD with Crucial m4 SSD and I have put the DVD in to an external case. I'm trying to update the SSD firmware and install Mavericks but I can't boot anything except MAC OS ...
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0answers
427 views

How to create linux USB discs that do work on Apple Macs?

It seems that there are several problems releated to incompatibilities between Apple-EFI and UEFI that do prevent Apple users from easily using USB drives to install or even run other operating ...
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1answer
181 views

My 2011 MacBookAir boot screen does not list MBR USB flash drives anymore – Why, and how to list them again?

I have a MBR-formatted, bootable USB flash drive with GRUB. I have tested it successfully on other computers - one with BIOS and another one with UEFI. I usually boot my 2011 4,1 MacBookAir with that ...
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0answers
2k views

Booting problem after Mavericks installation: BootCache.playlist: 2 No such file or directory

I have updated my MacBook Air 2011 from the App Store to Mavericks but after the installation it doesn't boot up (spinning grey ball). Safemode or a new installation didn't help and verbose mode ends ...
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3answers
599 views

Gray screen immediately upon boot. Cannot enter into safe mode, and cannot show boot loader with the Alt key.

How the problem came to be: I wanted to dual boot Debian on my MacBook Pro 8,1. I got my USB ready, downloaded ISO, and installed rEFInd. I restarted to make sure the new boot manager worked. It ...
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0answers
69 views

Encrypted Mountain Lion is not booting, showing OS X utilities screen

My FileVault 2 encrypted OS X Mountain Lion setup is not booting, but instead showing the OS X utilities screen. I have two accounts, User1 and User2. The encryption was enabled with User2's login ...
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0answers
198 views

Help needed installing OS X 10.6 on a clean iMac 8.1/early 2008

I have an iMac that has had the hard drive wiped completly clean, no partitions at all, just a blank drive, I have purchased OS X 10.6 installation DVD. I try to install OS X, the disc loads up and ...
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1answer
592 views

Boot iMac G5 17 iSight from external USB optical drive?

Is it possible to boot iMac from external USB CD-ROM?
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1answer
126 views

17" Powerbook G4 must sit for hours to boot

OS 10.4.11 1440x900 Resolution 1.67 GHz Power PC Processor 2x512 MB sticks of RAM = 1 GB total RAM I have tried several troubleshooting methods including different startup key combinations to reset ...
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0answers
1k views

MacBook does not list my bootable USB stick in the boot menu

I made a bootable usb stick with OSX Lion. When starting up my MacMini (which has OSX Mountain Lion installed) while holding option, the USB stick is listed and I can boot from it. But I want to use ...
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0answers
39 views

Lion crashes on first reboot attempt, is fine on second reboot

I'm having a weird issue with Lion on 2 different machines (2008 Mac Pro, 2011 15 inch Macbook Pro). The first machine was upgraded through several OS versions to Lion, the second came with Lion ...
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0answers
373 views

How do I unfreeze my iPod Nano 4th Gen?

tl;dr -- My iPod hangs on the boot screen (black background, silver apple logo). When I try to restore it (on both my Virtual Windows XP and on a Mac laptop), it'll restore fine, but when it reboots ...
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1answer
1k views

Can't boot MacBook Pro 13" (mid 2010)

The problem occurred after installing the update SMC 1.6 on Apple - OS X Mountain Lion: First for a long time was a white screen and noisy cooler After the system battery icon was crossed out and ...
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0answers
389 views

Trying to install Ubuntu on a Macbook with a new hard drive and no OSX

The hard drive of my Macbook failed recently. After installing a new hard drive I would like to use Ubuntu as the operating system, not Mac OS x. I burned a Ubuntu .iso to a disc and when I power up ...
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0answers
1k views

What steps can I take to recover data from a FileVault 2 encrypted boot volume that won't boot and is stuck in “converting” status?

I have a 2008 Macbook Pro running OS X 10.8 on a 500GB (upgraded from original) 1-2 year old hard drive. The drive was encrypted with FileVault2, and the system was running fine a few months ago until ...
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0answers
131 views

iMac does not boot in windows 7

my iMac (iMac11,2) refuses to boot in win7. Nor from bootcamp partition, neither from win7 installation DVD. It boots without any problem into Mac OS (10.6.8), it as well boots from mac os ...
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1answer
2k views

“This version of OSX is not supported on this platform.” when booting 2012 Mac Mini with SSD drive from previous system

When trying to boot a 2012 Mac Mini (purchased from apple.com) with the SSD drive from my previous system (a 2009 MBP), I get "This version of OSX is not supported on this platform". The version of ...
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1answer
172 views

Booting internally from a harddrive that was used on a different Mac

I just bought a new Mac Mini 2012 and have just replaced the drive in it with an SSD from my old MBP. Now the Mac Mini wont boot anymore, showing a stop sign when I try (after holding alt to begin ...
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0answers
199 views

iphone restarts on password lock screen

I have a jailbroken iPhone 4 with iOS 6.0.1. If somehow it gets shut down, I can't boot tethered. Can't use "Just Boot" in Redsn0w, because the phone needs to be shut down, but I can't make the "slide ...
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0answers
218 views

iMac hanging on startup

I've got a 2011, 21.5" iMac with a 1TB hard drive (likely Seagate, although I don't think I can check right now). After it froze, I did a cold restart by holding down the power button for a few ...
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0answers
125 views

Disable boot from CD/DVD

Is there a way to disable the boot from CD/DVD? I don't want to disable it permanently, just when it automatically checks on boot for the presence of a CD/DVD.
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1answer
130 views

Boot time on Mountain Lion

I have my MacPro Quad and upgraded to Mountain Lion. I have cloned the system hard disk to bootable external HD. I have tried it and works fine. Now when I have put the external HD in the BAY I to ...
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0answers
151 views

iMac 2011 spinning beach ball after login

the following is the HW profile of my iMac: Hardware Overview: Model Name: iMac Model Identifier: iMac12,1 Processor Name: Intel Core i5 Processor Speed: 2.5 GHz ...
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1answer
208 views

Regular Boot System Unresponsive

My computer was working fine until last night when I restarted. When the computer booted up and I logged into my account, I suddenly got the beachball whenever I tried to open an application. For ...
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1answer
391 views

MacBook Pro Lion crashes after a progress bar boot

Basically my MBP started giving me messages (out of nowhere) about how my Memory was too low and that I needed to shut down a few programs before continuing. In the end I was left with only Finder ...
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0answers
195 views

Boot into Legacy HD option rEFIt

I just synced my rEFIt partition tool and now I get an option to boot from legacy HD when at the moment the only bootable disk is that cotaining Mac OS X. Has anyone got any idea of how I can get rid ...
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0answers
1k views

iPhone won't charge anymore in infinite boot-loop [closed]

NOTE: I know this is a lot of text to handle, but I'll add a bounty whenever I can to the person who can bring me the solution. So see is as a motivation to read the whole text :) My friend has the ...
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1answer
301 views

Restoring a Boot Camp image with Windows 7 and making it bootable?

I have an image of Boot Camp with Windows 7, which was created by Carbon Copy Cleaner. I didn't realize that the image wasn't bootable until I had already deleted the partition. I'd like to restore ...
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2answers
1k views

MacBook Pro Mid 2009 does not boot without resetting system management control (SMC)

Today i started my macbook pro and after some seconds it stopped working (just turned). I was not able to start it again. After some apple support search I found a page that described how to reset the ...