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

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2answers
4k views

Macbookpro can't recognize bootable usb at boot time?

I have an old macbookpro: Model Name: MacBook Pro Model Identifier: MacBookPro6,2 Processor Name: Intel Core i5 Processor Speed: 2.53 GHz Boot ROM Version: MBP61.0057.B0F I created a ...
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1answer
8k views

How do I get into boot options with a non-mac keyboard?

I boot my mac mini, hold down alt on my non-mac keyboard, but it does not go to boot options. How do I get to boot options with a non-mac keyboard then?
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2answers
332 views

Notification area icons are sometimes invisible in Windows 7 (Boot Camp)

For some reason, sometimes my notification area icons are invisible in Windows 7 64-bit (Boot Camp, on an iMac mid-2010), as seen in this screenshot. Clicking on an invisible item does nothing. ...
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1answer
2k views

Computer starts up to gray screen, in recoevery mode getting "Open Error 5: Input/Output error on System/CoreServcices/ManagedClient.app/*

Computer starts up to gray screen, in recoevery mode getting "Open Error 5: Input/Output error on System/CoreServcices/ManagedClient.app/* My computer turned to sludge, and I hit the power button and ...
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2answers
880 views

Understanding kernel panic error log

My MacBook Pro worked all normal when all of a sudden it went black. It tried to reboot itself but immediately produced a kernel panic. From then on I was never able to boot again. I could only enter ...
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1answer
687 views

Error “/dev/disk04 could not be mounted” when using NTFS-3G

I use NTFS-3G in order to let myself read and write to my external hard drive in the correct format. My Mac is also bootcamped with Windows 7 on the other side. Every time I startup my Mac I get an ...
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1answer
254 views

Strange Freeze on My MacBook Pro 15.4" 2.0GHZ (A1150 / MA600LL) & No Sound After Boot

I have a MacBook Pro 15" A1150 (MA600LL) that will not boot except in safe mode. It gets almost all of the way through the boot then freezes with two vertical checkerboard lines and the ...
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1answer
910 views

Problem Installing Lion on MacBook2,1 using USB

I have a Macbook2,1 with 4GB RAM, Intel Core 2 Duo 2GHz and Leopard 10.5.8 and I need to upgrade it to Lion. I've downloaded Lion installation dmg file and restored it to a USB disk using Disk ...
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1answer
30k views

Can't start up MacBook Pro from OS X install discs

I wanted to re-install my mid-2010 15-inch MacBook Pro (Intel Core i7 2.66 gHz 8 GB 1067 MHz DDR3 RAM) which is currently running Mac OS X 10.6.8. I inserted the retail Mac OS X 10.6 install disc, ...
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2answers
2k views

How do I restore a Windows 7 DMG file to Boot Camp (and make it bootable)?

My iMac's HD died last week, and so I was unable to access OS X (I had a Time Machine backup of it though). Fortunately I was able to boot into the Recovery HD and use Disk Utility to backup Boot Camp ...
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1answer
4k views

Repair or recover drive from recovery mode

My main HDD is failing to boot. (Neither Normal, Safe mode nor Single User). I can only boot from Recovery Mode or DVD. The scenario was the following: Computer was asleep (lid down). Lifted the ...
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1answer
223 views

How to mute bootup sound? [duplicate]

Possible Duplicate: How do I disable or get rid of the startup sound my Mac makes? I have an old MacBook Pro (pre-unibody) running OS 10.6. I am annoyed by the traditional Macintosh bootup ...
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2answers
355 views

Can't login after updating software

MacOS asked me for update to EFI 2.7, I said ok. After rebooting I came up to the login screen. When I use my password for a moment I could see grey screen with mac's progress circle but then It ...
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1answer
187 views

Ejecting USB-Partitions on boot - works but not entirely

I have an USB drive with four partitions. SuperDuper uses these partitions to back up my mac. Since SuperDuper is scheduled, I have the USB drive constantly connected. But quite frankly the noise of ...
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2answers
1k views

Jailbroken iPhone stuck on boot screen

I tried to reload Cydia, which stopped working on my jailbroken iPhone 4. I downloaded "Redsnow" and "Ipsw 4.3.2", which worked, until I went to use and downloaded an app with Cydia. I did not ...
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1answer
438 views

Unable to boot up with Snow Leopard DVD

I accidentally deleted my /bin folder. My computer is now permanently stuck at the Apple screen with an infinite spinning indicator. I have: Inserted my Snow Leopard DVD Held down c - nothing Held ...
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1answer
3k views

Booting an Intel Mac to Linux from a U3 USB drive

Is it possible to boot an Intel Mac to Linux, or any non-OS X operating system, from the U3 partition of a USB drive? I know that because OS X uses EFI rather than BIOS for the boot process, the only ...
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4answers
2k views

Can I create a boot disk for 10.6 or 10.7 on a PC (to be used on a Mac?)

I have a Macbook Pro that had a hard drive failure, I've replaced the hard drive but I don't have a boot disk of any kind. I could just order a Snow Leopard DVD, but I have to wait a few days for ...
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1answer
1k views

iPhone 3GS switches off randomly after update to 5.0.1

I bought a used iPhone 3GS and the owner claims it worked fine with iOS 4.3.5. When I came home, I reset all content and settings on iPhone. Did I know that doing the reset would force me to upgrade ...
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1answer
113 views

Is there a way to automate restarting with a different boot disk?

I have Lion and Snow Leopard installed on my machine, and I switch between them all the time (I develop for compatibility on both platforms). Going into System Preferences and selecting the startup ...
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1answer
142 views

Help with kernel boot message

I recently turned on my iMac (White intel) to find it wouldn't boot. Running the boot in verbose mode I get the following message: Does anyone know what this means? Is it a hard disk error?
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3answers
847 views

Macbook (2,1) boots into blue screen and hangs

Last night, I shut down my computer. When I turned it back on, I just got the rEFIt logo (I have rEFIt installed). Usually, it takes a moment to populate the menu with a list of bootable devices, but ...
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3answers
1k 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
4k 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
2k 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
637 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
36 views

Macbook Air intermittently can't find startup disk

About six months ago, my Macbook Air started having a strange issue where it would often not be able to find the startup disk, giving me the flashing question mark. Initially, I was convinced the hard ...
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0answers
172 views

Windows 7 on Macbook Air 1,1 *without* Boot Camp

I'm trying to install Windows 7 on an early 2008 (1,1) Apple Macbook air, on which OS X is not present. The machine is not able to boot directly the win 7 iso, supposedly because it lacks some support ...
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1answer
48 views

Boot menu not working

So basically I can't boot from my ssd anymore. It just shows a grey screen with an error symbol. I can't get into target disk mode and none of the other boot shortcuts seem to be working either. When ...
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1answer
38 views

Force a read-only mount of startup disk

I want to create a MacOS recovery startup disk on a USB flash drive. In order to maintain the integrity of the drive's contents (and, perhaps more importantly, reduce write wear on the flash drive ...
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1answer
158 views

No bootable device - insert boot disk and press any key

When I boot my Macbook Pro 13" Retina (running newest Mavericks), it is showing me this error: However! If I boot holding the ⌥ alt-key, it shows Mavericks as option. When I press ⌤ enter-key to ...
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0answers
122 views

Dual boot Ubuntu 14.04 on a MacBook Pro

so after a few hours of Google searching and too many headaches with a broken GPT, I've turned here. I have a 2012 MacBook Pro (9,2) that I want to dualboot OS X 10.9 and Ubuntu 14.04 on. I've read ...
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1answer
83 views

cannot boot. volume disappeared from boot option after Disk Utility (GUI) repair

I have a 13-inch MBP with the latest OS X version. Problem Yesterday, I went to the Recovery Mode and performed Repair on my boot volume. I was not having a problem, but I just wanted to verify and ...
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1answer
263 views

MacBook Pro can't boot: shows Apple logo then grey screen

There is a MacBook Pro from 2012 with Mountain Lion that won't boot. The Apple logo is showing, the spinning wheel and then it just goes to a solid grey screen. I've tried to hold Cmd+R while ...
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0answers
98 views

MacBook pro boot's to wrong OS after waking up from Safe Sleep

I am dual booting Ubuntu and OS X Mavericks on my MacBook pro 9,2. I am using the rEFInd boot manager, since I was told that I should use it to dual boot OS X and Linux (I could have used rEFIt, but ...
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1answer
49 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
119 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
52 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
375 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
68 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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2answers
962 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
106 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
309 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
1k 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
73 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
130 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
461 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 ...