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

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1answer
598 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)?
16
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5answers
84k views

How to install OSX Mavericks in VirtualBox

I have been trying to use Hackboot to install OSX Mavericks in VirtualBox, and using an ISO image created by following the steps at How to create bootable ISO for OS X Mavericks The steps I have ...
0
votes
1answer
94 views

Mavericks install: “there was a problem… try reinstalling”, third time in a row

Mavericks install worked at first. I was able to enjoy Finder tabs and such. I updated Tuxera for Mac to 2013 and rebooted, then I was stuck at an endless spinner. I tried disk repair, safe mode, same ...
0
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1answer
167 views

If I update to Mavericks, will I be able to boot from USB?

running a late 2009 (5,5) Macbook Pro. I am currently unable to boot from liveUSB disks, but would really like to. I know that newer macs can do this (Macbook Air, new MBPs), but is it a hardware or a ...
1
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4answers
2k 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 ...
1
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0answers
72 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 ...
0
votes
2answers
4k views

Macbook Pro won't boot into OSX (circle with line through it), but Windows works fine

When I try to boot into OSX, after 30 seconds or so the Apple symbol is replaced by a circle with a line through it. If I try single user mode, it stops at a certain point before booting entirely and ...
2
votes
1answer
289 views

USB Drive with Mountain Lion Boot-Up Problem

I've tried a few ways to restore the Mountain Lion InstallESD.dmg to a USB hard drive to reinstall on my Mac Mini. I've used Disk Utility Restore, Lion Disk Maker and Carbon Copy Cloner. Each method ...
6
votes
1answer
3k views

Boot screen has wrong display resolution

I recently used my MacBook Pro (OS X 10.8.4) with a projector using a mini display port to VGA adapter. The resolution of the screen was modified from the use of the projector from 1680x1050 to ...
1
vote
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, ...
4
votes
1answer
793 views

Trapped: MacBook always shuts down during EFI SMC Update 1.8. Can't boot. How to remove updater from boot routine?

MacBook Pro i7 Mid-2012 (MacBookPro9,2) running Mac OS X 10.8.5: Downloaded the "offered" EFI SMC Update 1.8 through the AppStore Updates. MacBook restarted, grey progress bar appears w/ spinning ...
36
votes
2answers
107k views

Creating A Bootable USB Of Windows 8.1 On OS X?

Reasons for wanting create such a usb include: PC is unbootable and you want to prepare a bootable USB using the ISO file that you have on your external hard drive. to install Windows 8.1 on Mac ...
3
votes
1answer
4k views

Can I boot Linux (any distro?) from USB on a MacBook Air that has no hard drive?

I've a MacBook Air that has burned out three hard drives from OWC. The original drive is gone somewhere, and it no longer makes sense to purchase a replacement. The rest of the hardware is in good ...
3
votes
2answers
5k views

Cannot access vital boot options on Mac Pro with OS X Lion

I have this used Mac Pro (mid-2010) that I recently bought, that came with OS X Lion installed. It was apparently installed from an image because there are a lot of installed apps and, though there is ...
2
votes
1answer
30 views

FileVault and scheduled boot

After I have enabled FileVault the computer won't boot anymore at the scheduled time. Is it normal or has something gone wrong? If it is normal, are there any workarounds?
1
vote
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 ...
1
vote
1answer
230 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 ...
1
vote
0answers
262 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 ...
2
votes
1answer
1k views

Boot iMac G5 17 iSight from external USB optical drive?

Is it possible to boot iMac from external USB CD-ROM?
1
vote
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 ...
1
vote
2answers
3k views

Macbook Pro boots successfully when using hard drive in USB enclosure but doesn't boot when connected internally

Apologies for the long question. I will keep it as simple as I can. Last week my Macbook Pro (13-inch, Mid 2010) started to act strange. It started when I tried to open Skype and received an error ...
1
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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 ...
0
votes
0answers
159 views

Is there a way to boot on iMac from usb using a different OS and access osx files to back them up

I am having issues starting up my iMac. I would like to know if i create a bootable usb with Ubuntu or any other OS, would i be able to boot with it and access the OSX drive? I able to do this in ...
1
vote
2answers
39k views

Stuck at Apple logo during boot. Cannot enter Safe mode. Cannot use Recovery USB

A little background I wanted to create a Mountain Lion recovery USB because I currently only have a Lion recovery USB. While downloading the installer image from the Mac App store, the computer froze ...
1
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1answer
6k views

What does boot.efi actually do?

I understand that when a Mac's EFI system runs, it locates the file boot.efi in the /System/Library/CoreServices/ (blessed) directory and runs this as an EFI application (subverting a large part of ...
0
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1answer
2k views

Bootcamp and wireless usb keyboard: How to boot with Mac os

I have a Mac mini. I installed windows 7 with bootcamp and now windows 7 is the default OS. My problem is that it doens't seem to recognize my keypress during the boot (I have a logitech usb wireless ...
0
votes
0answers
2k views

Bootcamp problem -> not booting into Windows

Every three restarts when I'm holding down the option key and try to boot into Win7 the screen goes black and nothing happens. The indicator is the blinking cursor - if it's absent in the start, ...
0
votes
1answer
396 views

Preventing booting from external media

Is it possible to set up Mac OS X 10.8 (Mountain Lion) on a MacBook Air so that users cannot boot from external media (e.g. a USB memory stick) and cannot restore the OS from the internal restore ...
0
votes
2answers
1k views

Mac Book Air mid-2012 completely disappeared disk

I've tried to wake up my Mac Book Air from sleep today, but I got a black screen. After waiting 10 min, I decided to shut it off by holding the power button a few sec. After restarting, I had a ...
0
votes
0answers
890 views

How do I troubleshoot a white MacBook that won't boot?

I was given an older MacBook (MacBook 2,1, Late 2006, A1181) that won't boot. I can't figure out why. When I push the power button, the CD drive spins, like usual, and the white power light on the ...
2
votes
1answer
646 views

CoreStorageFamily::unlockVEKs() failed to unwrap the vek, status = e00002bc

I have a filevault2 disk with two partition. One is the boot partition, the other contains data, both are encrypted. Today, after installing the latest 10.8 update (10.8.4 I guess), the computer ...
0
votes
1answer
568 views

Why does my macbook always shut down on recovery?

Hi am trying to fix a MacBook Unibody Model A1342, The macbook has an unknown error that might also be caused by water accident or drop or just internal problems. (I dont know about the macbooks ...
0
votes
0answers
73 views

MacPro4,1 USB Boot?

Just bumped into an odd problem with my MacPro4,1 (2009/Nehalem) wherein I cannot boot from USB bootable disks. My various disks are recognized from System Preferences -> Startup Disk, however they ...
0
votes
0answers
281 views

OS X Lion never boots

When starting up my iMac with OS X Lion 1.7.3 it will show the Apple logo, and soon after a progress bar with the typical spinning progress indicator. The progress bar will go up to about 8%, ...
4
votes
2answers
5k views

disk full - Mac OS won't boot

My friend has a problem getting Snow Leopard to run because the disk is completely full. I suggested getting into command line mode (CMD+S on boot) and delete some things, but it didn't work (nothing ...
2
votes
1answer
42 views

How to enable ssh proxy every time I resume desktop

I start ssh proxy by a command similar to the following when I login to the desktop. ssh -N awsproxy.vpc Also, I need to type this every single time I resume my desktop from sleep mode. Can you ...
0
votes
1answer
203 views

MacBookPro wont boot Transcend SSD320

I have been having trouble booting my macbook pro. I have a backup of everything on the cloud so I tried reinstalling the system from my usb mountain lion stick. Unfortunately the disk utility did not ...
0
votes
1answer
166 views

What available methods are there to boot a Macbook Pro

I have a macbook pro 15" early 2011 model, which I would like to install linux on (dual boot setup). However, I don't have an optical drive for it since I replaced it with an SSD. I need some way to ...
2
votes
0answers
130 views

Boot Linux from USB drive

I've installed Fedora on a new SATA SSD drive for my MacBook Pro, and when installed into the laptop, it boots perfectly (and runs wonderfully!). However, I want to boot from it externally until I'm ...
-2
votes
2answers
443 views

precaution or steps to take before booting up 4 months unused macbook air

My mother was ill for quite some-time, and she didn't use her MacBook Air for almost 4 months now. Before booting it up again, and start making use, please let me know if there are some necessary ...
1
vote
1answer
331 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 ...
2
votes
0answers
2k 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 ...
0
votes
1answer
59 views

Why would a macbook running OS X 10.7.5 boot up on its own at the same time every night?

The macbook was turned of around 10:22PM. At 12:00:09 sharp it boots up on its own. This happens every night even though the user turns off the machine at around 10PM every night. Why would this ...
0
votes
1answer
624 views

Can't boot from Snow Leopard DVD

I bought a new hard drive for my 2011 MacBook Pro and did the following steps: Backup using Time Machine Replaced the hard drive Put in a Snow Leopard DVD (10.6 from ~2009) Booted holding down the c ...
0
votes
0answers
169 views

2010 MacBook Pro won't boot

I'm having an issue with my 2010 MacBook Pro. It started crashing a lot a couple of months ago, eventually even with kernel panics. Sometimes after a crash, during the next boot, it would display a ...
3
votes
3answers
4k views

Logging out and in on OS X takes 4-5 minutes?

I've got a 3.4 GHz i7 iMac (8 cores) with 24 GB of RAM. (2 16 GB chips plus 2 4 GB chips.) I know this amount of RAM is "officially unsupported" which is why I mention it. Lately logging out (to ...
1
vote
1answer
725 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 ...
0
votes
0answers
483 views

iMac does not show bootable USB drive on boot menu

I downloaded the Linux USB Image of memtest86 and used dd to get the image on a USB flash drive. Whenever I used it on an iMac Late 2006 (running SL) or the newest Macbook Air 13'' (running ML) the ...
3
votes
3answers
2k views

Installation stuck at grey boot screen on Macbook Pro 4,1 (Early 2008)

I would appreciate any help you guys can give me since I would really like to upgrade my laptop to Mountain Lion. Computer: Macbook Pro 17" 4,1 (Early 2008) RAM: 4 GB RAM Hard drive: 128 SSD Hard ...
1
vote
2answers
1k views

Installing windows on late 2009 iMac 27"

I've sucessfully installed Win 7 x64 twice on my imac before. However the 2009 iMacs had faulty HDD, I had it replaced and after that I have trouble installing windows. I know about the display ...