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

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0
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0answers
14 views

iPhone 3G stuck on boot logo - iTunes not available

This might be easy on Win/Mac but I only have Linux, so no Itunes is available: I have an ooold iPhone 3G that runs iOS 3.1.3. It might be jailbroken, I can't remember because I haven't used it for a ...
0
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0answers
122 views

Mid 2012 15 inch MacBook Pro Yosemite 10.10.3 Grey Screen Startup Freeze w/ Bootcamp

Recently, I tried to log into a windows partition (created with Bootcamp) that I had not been on in a while. When I selected that partition from the boot options screen, it would freeze on a ...
1
vote
1answer
49 views

Gray Screen on Boot

After getting some kernel panics and failing to fix it, I decided to reinstall OS X. It now boots but gets stuck on a gray screen with the Apple logo. The odd thing is I can boot into single user ...
1
vote
2answers
37 views

2009 Macbook not booting up

I found a white plastic/ rubber 2009 Macbook in the IT Office of my school and was given permission to try to get it to be usable again. Currently, it is able to be charged with its magsafe connector ...
0
votes
1answer
32 views

iPad mini will not turn on

I can not get my iPad mini to turn on. I have tried to press the home and power button simultaneously but that doesn't work and when it is attached to the charger I hear the charge ding sound. What ...
1
vote
1answer
224 views

How to boot Linux from Mac using rEFInd

I have successfully installed rEFInd on my MacBook Pro 2015 so I can boot into Linux however I cannot seem to boot into it. Here are my issues (both with Ubuntu 64x Mac CD and Kali Linux 64x USB). ...
0
votes
1answer
86 views

iMac won't boot to internal drive, usb sticks - Apple hardware test extended fine

My iMac is being very odd. It won't boot using the internal hard drive. It chimes, starts the Yosemite progress bar and then changes and looks as if it is about to show me the login screen but then it ...
0
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1answer
77 views

Stop sign when booting from internal ssd, boot goes fine if the ssd is in external case

sorry for the long post and my english. I have an early 2011 Macbook Pro 13 which I purchased in july 2011 and it worked fine until one week ago. Since when I bought it i replaced the stock hdd with ...
3
votes
2answers
187 views

How to backup with Time Machine in Single User Mode?

Is there any way to enable Time Machine / tmutil and perform a backup from inside the Single User Mode? I have a Late '11 Radeongate-affected MBP that won't boot beyond the gray boot screen anymore, ...
0
votes
1answer
204 views

How to use Boot Camp Assistant to create a dual OS X, Ubuntu system?

I would like to use Boot Camp Assistant to partition my HD, reserving around 30 GB for Ubuntu. I would then have a dual OS X Yosemite and Ubuntu Linux system. This used to be fairly easy. Boot Camp ...
0
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0answers
65 views

MacBook Pro keeps returning to login screen

I can login to safe boot without issue. I created a new admin account through safe boot, but upon first full login into this new account, the same behaviour as in the title showed up instantly. I ...
2
votes
3answers
23k views

MacBook Pro flashing question mark but I can't repair because hard disk not found in disk utility

Today my MacBook showed up some wheel of death and I waited and waited and then after a long time (10 minutes) decide to force shutdown. Ok, I know its not a good idea but I've done this before and ...
0
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0answers
61 views

iMac 27 inch - 2013 not booting - Black Screen

My iMac 27" will not boot up. Chime does not play and the device does not power up, and shows no white screen. Only a black screen with no boot up sounds. If I hold the power button for long enough ...
0
votes
1answer
78 views

Cannot boot to OS X using rEFInd

I have installed rEFInd 0.8.7 on my 2015 13" MBP onto another partition however it does not detect OS X. Here are my disk partitions: /dev/disk0 #: TYPE NAME ...
0
votes
1answer
47 views

How to check which parts of a dead MacBook Pro 17" Mid 2010 work

Mac was water damaged. No start up chime. Charger shows green light dimmer than when plugged in to working Macs when plugged. Battery status button on side has no effect. Won't start in safe, target ...
0
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0answers
40 views

rEFInd keeps deleting itself

It has been some time since I have downloaded rEFInd. It was fine ever since, though later, it did start acting strange. For example, the resolution of the rEFInd window was absolutely wrong. Though ...
0
votes
1answer
47 views

Unable to reach Startup Manager or any boot options on OSX Leopard

I have 5 year old 17" MacBook Pro running Snow Leopard that, without any warning, is suddenly unable to locate its startup disk. I've tried every possible boot key combo, but only zapping NVRAM works, ...
7
votes
8answers
25k views

How to permanently disable (defective) graphics card in MacBook Pro?

My graphics card has malfunctioned and is preventing my MacBook Pro (2011) from booting. Based on my research I will have to otherwise have the logic board replaced. The defective ATI graphics card ...
0
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0answers
42 views

os x boot volume

was hoping someone might be able to help me figure this out when i run the cmd "systemsetup -getstartupdisk" the output is "/Volumes/13/WINNT" My hard drive setup is a gpt schema with three ...
0
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2answers
2k views

Can't open my iPad mini

I shutdown my iPad and left it for a while. Now I want to start it again and I can't open it. I've used the sleep/awake button, also use that with the home button but I can't open it at all. It sits ...
1
vote
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 ...
1
vote
0answers
250 views

MacBook won't boot from internal SSD

I got a 2011 MacBook Pro and had a Samsung 840 Pro installed running Mountain Lion, then Mavericks for about a year without any problems. Without any apparent reason the MBP just wouldn't boot from ...
0
votes
0answers
75 views

Boot Android from USB on Mac. Has anyone tried it yet?

I'm interested in creating a bootable usb working on Mac, with Android x86 on it. I tried a couple of methods without any results. Well, maybe a bad one as I said in my other question (if you could be ...
0
votes
1answer
36 views

4SNS TCBC - Which Mac Pro sensor is that?

Briefly my Mac Pro (4,1 Early 2009 ) stopped booting which I eventually traced to the plastic clip holding the north bridge down failing. Seems to be a common issue. Replaced the clips and now it ...
1
vote
2answers
10k 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 ...
0
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0answers
35 views

How to backup, restore and erase OS X GPT using dd under Linux?

How does one backup, restore and erase OS X GPT using dd under Linux like it's shown in Archlinux Wiki using the MBR analogue: To backup the MBR: # dd if=/dev/sda of=/path/mbr-backup bs=512 count=1 ...
0
votes
0answers
34 views

Stop xcode opening file on startup

I cloned my hard drive onto an SSD using SuperDuper. Now when I boot using the SSD, xcode opens an obscure source code file living in /opt (always the same file). I've tried quitting xcode, restart ...
0
votes
1answer
147 views

How to replace internal HDD with SSD in Mac Mini?

I'm a complete nube to Mac (bought Mac Mini 10/Apr/15). So far I have cloned OSX from Internal HDD to USB SSD which is to become my Boot Disk. The HDD is solely to hold a recovery partition, and Data ...
1
vote
0answers
4k views

rEFIt boot changed after update to Yosemite

I was using rEFIt to work with Ubuntu with my Mac. After the upgrade to Yosemite I had a problem with rEFIt. I found the following solution on ubuntuforums.org but rEFIt still didn't work: cd ...
58
votes
2answers
161k 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 ...
1
vote
0answers
29 views

MacPro: Flashing world logo, can't go into any mode, incorrect password types itself

When I turned on my mac this morning, the world logo flashed and then took ages to boot up and finally when my logon screen came up. An extremely long password started typing itself out. I deleted ...
1
vote
0answers
17 views

How do I locate and disable background PGP and Kapersky start up programs?

I had to uninstall Kapersky by deleting the application but the item still shows up on my task bar when I restart. Also, I have PGP installed on my mac, but when I telnet to port 25 of another ...
2
votes
2answers
7k views

Booting from USB to install Windows 7 on Macbook Pro, Early 2011

I used Bootcamp (5.0) to create a Windows 7 install USB. It successfully created the install USB but when I reboot the system and hold down the option-key to boot from the USB drive, the boot-loader ...
3
votes
3answers
1k views

Boot up error prohibitory sign flashing folder with question mark

3 weeks ago my hard drive failed so I bought a new one. (Macbook pro late 2011) 5 days ago, the new one flashed prohibitory sign, flashing folder with question mark. Every once in a while I could get ...
0
votes
1answer
262 views

Cannot boot Mac Mini with striped RAID 0 set

Today we could not get one of our machines running with 10.9 and RAID 0 which stripes the data on the boot volume. After several hours of doing the 'standard' tasks like fixing permissions etc, we've ...
0
votes
1answer
339 views

Mac Mini can't unmount disk in Recovery Mode

I need to wipe my Mac Mini and reinstall OS X. Booting into recovery mode (holding command+option+R), I try to erase the disk in Disk Utility but it says it cannot unmount the disk or gets stuck on ...
0
votes
0answers
118 views

Cannot boot Mac OS X Yosemite due to libJPEG.dylib

My Macbook Air 2014 does not boot to login and it freezes. This picture below is captured in verbose mode (from Command+V). I have no idea how to solve this. What I did before this happen is ...
0
votes
1answer
74 views

MacBook with a new hard drive fails to start

I have a 2009 MBP (7,1) which I recently upgraded the hard drive to a Crucial BX100SD. The hard drive was configured via. a USB to SATA cable on my desktop machine. I used a Flash install of ...
7
votes
4answers
45k views

Repair disk from single user mode (fsck fails)

Earlier today my 2009 iMac emitted I/O errors trying to copy files. So I ran disk utility, verify disk to see if anything was amiss. It was. But as it's my startup disk I couldn't repair it, so I ...
0
votes
0answers
77 views

No menu bar or dock on OSX 10.10 after installing rEFInd and Ubuntu

Umm, yeah. I'm stuck between a rock and a hard place. See, I needed Linux for software development, and the obvious choice (while some might argue) was Ubuntu. So I installed it as dual-boot with OSX ...
0
votes
1answer
188 views

Can't boot off of USB on Early 2006 iMac and can't get to Startup Manager

Recently, I've gone through the trouble of replacing the hard drive on my Mac with the model A1174, which the Internet says is a iMac "Core Duo" 2.0 20-Inch Early 2006. Needless to say that I do not ...
1
vote
0answers
125 views

MacBook Pro hangs up at the grey Apple login screen

After it would hang up, the keyboard lights would stay lit indefinitely. I've tried resetting the SMC and NVRAM but they didn't work. I did a verbose startup and this was the screenshot before my ...
1
vote
0answers
179 views

Need to clean install Yosemite without knowing or resetting password

I have a laptop that I would like to get in working order. There are 2 main issues: I forgot the password. When I boot the laptop, I am seeing the flashing folder with a question mark which ...
2
votes
6answers
3k views

My mac has 64-bit EFI, but it only boots with 32-bit kernel

I followed the guide at http://macperformanceguide.com/SnowLeopard-64bit.html to boot into 64-bit mode. I had no problems with the instructions and on the boot screen it says "PAE enabled, 64bit mode ...
0
votes
1answer
128 views

OSX Yosemite won't show desktop

So I got some freeze issue and beach ball indicator was appeared for me. So I was watching rotation of it during ten minutes and then hard reset my mac. So did because I can't click any buttons or ...
0
votes
0answers
825 views

Single User Mode not starting

First of all, there's no firmware password or anything fancy. I'm trying to diagnose a late-2011 MacBook Pro 15", and I'm trying to get into the single user mode. I press and hold Cmd+S (the left Cmd, ...
2
votes
1answer
1k views

Install Windows on MacBook Pro, without OS X

I installed Linux Mint on my 2006 MBP 15" this weekend before hearing that the system will not enter a compatible firmware mode for Linux/Windows without rEFIt or rEFInd installed first. Well, I do ...
1
vote
2answers
1k views

My MacBook Pro has a flashing question mark in a folder against a grey background

My MacBook Pro shows a grey screen with a flashing question mark in a folder. I tried connecting it to an older MacBook using firewire cable. I restarted the Macbook Pro in Target Mode. Now I see ...
0
votes
1answer
316 views

Vertical green stripes when iMac starts to boot up

An iMac has 5 green vertical bars/stripes that appear on the screen as soon the system starts booting. The OS is Yosemite (10.10.?) When I try to boot the computer normally, safe boot, or ...
0
votes
2answers
353 views

My MacBook Pro, gets stuck at boot screen and the graphics look weird

I have a 2011 MacBook Pro i7 and I have upgraded the memory to 8 GB and the HD to an SSD 500GB. The other day I had it running for 3 days non-stop and when I tried to use it it was frozen. I reset it ...