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

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182 views

How to make a bootable (encrypted) copy in an external drive from a FileVault 2 encrypted boot partition

I configured my MacbookPro (Retina) as follows: /dev/disk0 (GUID partition scheme) EFI 200 MiB Apple CoreStorage 128 GiB <- FileVault 2 encrypted Apple Boot 650 MiB <- ...
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1answer
7k views

MacBook Pro won't boot with new hard drive, but a different MacBook Pro will

So here are the details. My friend and I both have 13-inch Mid 2010 MacBook Pro's. Same processor and specs since they were purchased at the same time, but originally had 250 GB hard drives. His hard ...
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1answer
250 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
167 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
2k 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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2k views

iMac 27″ boots successfully to safe mode only

I can only boot my iMac 27″ (end of 2009) in safe mode. The problem started in Lion, when the computer suddenly froze. All I can get is the grey screen, which turns black after a while. I upgraded ...
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163 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
452 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
3k 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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1answer
180 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
796 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
236 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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1answer
376 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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2answers
3k views

Screen backlight does not turn on during bootup, but turns on when accessing recovery partition

I have a late-2011 15" MacBook Pro running Mavericks. I normally don't reboot my computer and can leave it logged in for days on end. I decided to reboot my computer and when it was booting, the ...
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0answers
657 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
99 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
209 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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1answer
68 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
295 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
1k 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
457 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
3k 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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2answers
2k views

Upgraded to 10.9, but it broke my Windows 8.1 Boot Camp partition!

I just got Windows 8.1 set up via Boot Camp a couple days ago, and everything was working wonderfully. Today, I upgraded my Mac to OSX v10.9, as suggested by Apple. Nobody told me it would break my ...
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1answer
763 views

How to run OS X from DVD or USB stick?

I would like to have a safe "Linux-like start/boot from DVD or USB stick" environment. How to do such security thing for the latest OS X (10.9 Mavericks)?
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76 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
401 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
530 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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1answer
307 views

What is the simplest way to dual-boot linux?

I am looking for the most straightforward way (both in initial setup and in maintenance) to set up a second partition on an OS X machine for (either) Debian or Ubuntu. I won't be running any other ...
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0answers
42 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
830 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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0answers
643 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
162 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
3k 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
203 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
216 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
309 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
237 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
136 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
229 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
241 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
461 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
373 views

SSD only boots from USB adapter

I would like to know if anyone has an idea or suggestion to what's happening on my SSD. I was using Lion on my Vertex 3 SSD 240GB - MacBook Pro (early 2011 model) and everything was running well ...
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0answers
2k 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
321 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
445 views

Trouble with Memtest86 4.0a on 15" MacBook Pro

I have a 15" MacBook Pro late 2011 (MacBookPro8,2) It has a 2.4Ghz Core i7 CPU and 4GB of stock RAM. I'm trying to run Memtest86 4.0a from boot (Memtest86+ does not work.) After about 5 seconds into ...
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2answers
2k 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 ...
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4answers
21k views

Lion hangs on boot with empty progress bar and then switches off

Today as I was working on my MacBook Pro, it became incredibly slow and almost impossible to work with. I spent five minutes trying to restart it from the system menu, and eventually I did. It took ...
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1answer
2k views

Snow Leopard installer ISO on USB flash drive

I have the setup ISO file for my Mac OS X Snow Leopard. I need to be able to boot this and install it to a USB drive (from a windows pc by booting the USB drive). I can't run it in a virtual ...
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3answers
2k views

Yosemite boot times

I have a brand new iMac 3.5GHz i5 with 8GB of RAM with a non SSD drive. When I boot Yosemite it takes 52 seconds from the gong to the desktop, most of which is spent with the progress bar. This seems ...