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

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1answer
3k views

restore Mac OS Mountain Lion to factory settings without discs or time machine backups

I installed XCode 3 on Mac OS Mountain Lion 10.8 and now I am getting the Apple BSODs. Can I do a system restore without having the discs as I seem to have nothing to use, also I have no Time Machine ...
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1answer
12k 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
367 views

Lion Boot from a Flash Drive Mac

So I'm trying to load a Lion DMG onto a 16GB flash drive according to this tutorial, but I only get as far as step 9. The data starts to restore to the flash drive, but right as it gets to the end, ...
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1answer
174 views

Is this fun partition mess I have made fixable on the Mac OS X side?

On a MacBook Pro, a wrong decision long time ago still causing numerous problems. In a nut shell, I run bootcamp and OS X together on the same drive and the OS X stopped booting a while ago (I was ...
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2answers
118 views

Keyboard shortcut to prevent login items from loading but still allow extensions

I know that if I boot my Mac while holding down Shift, then it does "safe mode" which causes it to boot without either login items or extensions. I often want to boot the computer and not load login ...
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4answers
530 views

Is the boot time of an iOS device affected by the apps that are running at shutdown?

I suspect that apps that use system services might take time to register each app in the appropriate places at startup. Is the boot time of an iOS device affected by the apps that are running at the ...
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1answer
681 views

What's the startup/reboot time for iPad (3rd generation) compared to other iOS devices?

I'd like to know, in people's personal experience so far, about how long the new iPad takes to start up (in seconds), especially when compared with other devices running iOS. For the purposes of ...
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1answer
2k views

Create bootable USB drive from Linux ISO

I'd like to take a Linux ISO (e.g., CentOS, Ubuntu), and create a bootable USB drive. (It will be used for booting on a stock PC, not on the Mac). How do I go about creating such a drive using a Mac?
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2answers
5k 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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2answers
475 views

My personal settings on OS X disappear after booting Windows (XP or 7) on my MacBook Pro

I installed Windows 7 (and XP before) on my MacBook Pro and whenever I boot my Windows and after that boot my OS X my clock shows the wrong time and my login items that I set in the system preference ...
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1answer
40 views

a bad Shutdown resulting in a flashing folder with question mark

I was rebooting my MBP when i turned off abruptly, now when i turn on my Mac again i just see a Flasing folder icon with a question mark instead the Apple Logo. i have MacBook Pro 15" Late 2012 (Non ...
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1answer
116 views

Mac boots into log on screen quickly but takes long time to log into account

I just replaced the stock OEM hard drive on my 2010 macbook pro 15 inch with a Samsung 840 Pro SSD 256GB and installed Yosemite on it from scratch with USB (the first time i am using Yosemite). Now ...
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3answers
553 views

Panic on boot, need to use single user mode (was: need to rebuild kext cache)

I'm getting this at every boot on one Mac: With some searching and asking around I've found that I can get a successful boot if I boot into single-user mode, mount / as read/write, and then do ...
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1answer
2k views

Yosemite won't boot in safe mode with Shift held down

I'm investigating some slowness with my late '13 rMBP which I upgraded to Yosemite on Sunday. Problem is, I can't boot into safe mode by holding the Shift when restarting or powering up. I tried ...
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1answer
30 views

what does it mean if my macbook loaded in safe mode?

My MacBook just booted in safe mode. Is it possible that somehow I made it to do so, or can it automatically load in case of a malfunctioning? What does it mean if it did so automatically?
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2answers
108 views

Boot on USB from a previous version of OSX

I own a mid-2013 Macbook Air running Mavericks and wish to boot on a USB stick containing a bootable version of DiskWarrior. The problem is DiskWarrior wasn't updated for quite some time and, though ...
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3answers
211 views

Disk became full, had to force shutdown, now it doesn't boot

Don't know why I didn't get a warning about disk being almost full... It came down to zero free space and I couldn't do anything except force-shutdown it. I booted into Windows, deleted some files ...
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1answer
76 views

Boot straight to an Application when Mac is turned on

I have a client who wants to use Mac OS X and a Mac Mini to sell a software solution to end users that ALWAYS boots straight to an application when the Mac is turned on. They can't access the login ...
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1answer
971 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
2k views

Login - Screen Flashes and Returns to Login Screen - Tried Everything Possible

I have an absurd issue which pretty much nothing seems to be able to fix - I have a 2011 Macbook Pro running Mavericks. When I try logging into my main account with the correct password, the wheel ...
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1answer
436 views

Reinstall Mac OSX on Ubuntu Macbook

Last year I installed Ubuntu on my 2006 MacBook (Intel), and erased the hard drive with MacOSX 10.5 in the process. Linux was fun, but now I want another Mac to play around with. I've put 10.8's ...
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1answer
154 views

Using startup commands when the default startup disc is not OSX

I have to use a startup command (ie command - S for single user mode) when restarting my computer, but this is proving to be impossible, as the startup disc is windows by default on my computer - ...
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2answers
2k views

Boot OS X install from one Mac on another Mac

It seems I can't boot a system installed on one MacBook in another MacBook. My laptop needs a few days of servicing, so I thought it would be easiest to clone an image of my OS X install on USB ...
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1answer
2k views

iMac Startup I/O Error Despite Successful Disk Repair

My Early 2008 iMac with OSX 10.8.5 no longer boots beyond grey screen with spinning gear. Verbose mode shows a load of I/O errors. Disk Verify/Repair run via recovery partition completes successfully, ...
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2answers
5k views

OSX system and installation disk won't boot

Problem: I cannot boot into system nor can I boot to the installation disk. Errors I get in verbose mode: BSD root: disk0s2, major 14, minor 2 disk0s2: media is not present 0 [Level 3] [ReadUID ...
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1answer
231 views

Switch from a not-installed Windows partition to Mountain Lion

I tried to install Windows in dual boots (version 4 I think) in my Macbook Pro 10.8. Everything was fine until Windows boot for the first time for it's installation. The operating system was not able ...
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1answer
118 views

Macbook Pro 2011 Snow Leopard Boot Camp with Parallels Desktop 8

Quick question in response to a very thorough bootcamp post already on this forum. For anybody that has a working Mac, Windows and Shared partition ... is the Boot Camp partition recognised by ...
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1answer
727 views

How can I boot my MBP into normal mode despite shift key being broken (and on)?

I recently went to the Apple store with my laptop because it would only boot into safe mode and would not accept my password. While there, they said some liquid ruined something in the inside of my ...
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1answer
142 views

Boot into Safari-only mode in Mountain Lion?

In Lion, you used to be able to boot into a Safari-only mode. Where did that go in Mountain Lion?
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2answers
6k 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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2answers
407 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
3k 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
1k 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
832 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
285 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
1k 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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3answers
3k 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
5k 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
239 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
373 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
193 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
452 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
3k 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
114 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
154 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
894 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 ...