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

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2
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1answer
2k views

My MacBook died and won't start anymore

I have a 6 year old MacBook. It suddenly died last Sunday. When I started it the battery was charged to 100% - some minutes later it was at approximately 20%. Then the screen suddenly turned black and ...
0
votes
1answer
292 views

iMac 27'' mid-2011 stuck on startup (grey screen)

Okay, so I'm having the dreaded grey screen on my iMac - precisely : i'm having it doing a normal startup i'm having it trying to boot from recovery partition i'm having it trying to boot for ...
0
votes
0answers
63 views

USB Keybard not activated at boot

I've got a Mac Mini with Mavericks with a WASD Keyboard v2 (ISO layout) attached. When I boot the system the keyboard is somehow not recognized by the OS (i.e., I type and nothing happens). The ...
1
vote
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 ...
1
vote
1answer
268 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 ...
0
votes
1answer
231 views

Time machine restore failed to fix boot

After connecting MacBook Pro running 10.8 to video project, the system crashed and after restart it booted into recovery (OS X Utilities). I tried to fix the problem with checking disks and disk ...
0
votes
1answer
90 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
votes
1answer
1k views

Remove 2nd partition, reclaim space

If I have a dual booting computer (os x 10.7 and Linux), and would like to remove the Linux partition and return it to one single large disk running os x, how is this done? Is there risk to messing up ...
0
votes
0answers
364 views

Can't use Boot Camp because startup disk must be Mac formatted

During the Boot Camp installation by mistake I erased the Macintosh HD partition, but before continuing the installation of Windows I stopped the process. Using a bootable live CD I saw that all the ...
0
votes
1answer
163 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 ...
0
votes
2answers
2k 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 ...
1
vote
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
0answers
49 views

Recover from deleting all partitions. I don't want to keep OSX

I've tried to install Fedora on my 2007 Mac Mini, using rEFIt to boot from the USB. Thanks to Fedora's horrific excuse for a patitioner, I believe I've deleted all the partitions on the HDD. I had ...
2
votes
1answer
273 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 ...
0
votes
0answers
170 views

rEFInd hangs on boot and shell launch on a Mac Mini

I have burned the rEFInd 0.74 USB image to a pendrive and booted a Mac to it. The boot manager's menu works fine and shows boot icons for all the OS installations I have but when I try and boot to a ...
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, ...
1
vote
1answer
1k 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
3answers
1k views

How to enter boot menu without command key?

My Macbook air has a keyboard issue, the Z key does not work except upon startup where it becomes stuck for several seconds. This interferes with opening the boot menu on startup, because it detects ...
2
votes
1answer
28 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?
21
votes
5answers
15k views

How can I run/stop/relaunch an application automatically, at boot/login/some other time?

How do you make a script or app to run or stop running automatically when the system is booted, a user logs on, at a specific time, when a disk is attached, etc.?
5
votes
3answers
14k views

What can be done to fix a 2011 iMac that will not boot past the white screen?

I have now tried opening the iMac and removing the cables to the SSD, it still gets stuck on the white screen. I tried again, removing the cables to the HDD as well and the same thing occurs. No idea ...
1
vote
2answers
363 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, ...
-1
votes
1answer
568 views

Macbook won't boot, possibly HDD issue

I am posting this for a friend who is having this problem but obviously can't post this himself as his computer will not boot up. He started having problems after a video game crashed during online ...
1
vote
1answer
114 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 ...
1
vote
1answer
187 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
243 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 ...
0
votes
1answer
793 views

Is it safe to reformat drive during Recovery Mode install?

I've inherited an almost brand new 13" Macbook Pro Retina. I'd like wipe the hard drive clean and start with a fresh install of Mountain Lion. I've done this a million times before... but never while ...
0
votes
0answers
147 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 ...
0
votes
0answers
155 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
29k 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
vote
1answer
5k 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
votes
1answer
693 views

OS X Snow Leopard installer hangs

I installed Linux on my MBP. I just told it to overwrite the whole hard drive so OS X is gone. But now I want to go back to OS X so that I can upgrade to Lion. I start up my MBP with the ...
0
votes
1answer
1k 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
1k 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
334 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
747 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 ...
4
votes
3answers
1k views

Renaming the startup disks shown during boot

I'm dual booting OS X (Lion) and Arch Linux, and when I hold down "option" during the boot process, I am presented with both of my startup disk options (i.e., OS X and Linux); however, they are named ...
0
votes
1answer
457 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 ...
2
votes
1answer
527 views

Apple powerbook G4 17" Trying to install Linux

I believe followed the directions on how to create a bootable USB drive from the Ubuntu website. My question is how can I get my Powerbook to boot from the USB drive? I tried doing the ...
0
votes
0answers
64 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
259 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%, ...
2
votes
1answer
41 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 ...
3
votes
3answers
1k views

Why does RAID 1 “Mirroring not provide performance improvements”?

I have always used Software RAIDs, either Apple-provided, or via SoftRAID, etc. I am about to re-zhuzh my arrays and decided to do a little research beforehand… and On Apple's site, there is a ...
4
votes
2answers
4k 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 ...
0
votes
1answer
9k views

How to install Snow Leopard from USB where USB disk is prepared using Linux?

I'm trying to install Snow Leopard (a retail version) into my MacBook, but seems like that the MacBook can't find the boot disk over USB. I guess this is related to the fact that I mounted the .iso ...
0
votes
1answer
185 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
155 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 ...
6
votes
4answers
5k views

Can I schedule startup and shutdown with different settings for weekdays and weekends?

Everyday, I usually start my Mac Mini at 16:00 and shutdown it at 2:00 using the Energy Saver schedule settings. I would like to be able to set a different behavior on the Weekends starting Mac Mini ...
2
votes
0answers
124 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 ...