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

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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 ...
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0answers
12 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 ...
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1answer
24 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, ...
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1answer
45 views

Uninstall rEFInd 0.8-3.7 on Yosemite

I recently tried installing rEFInd on Yosemite using the command ./install.sh --alldrivers however it would not recognise the ubuntu 14.04 x64 for Mac disk I made and so I would like to uninstall ...
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8answers
22k 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 ...
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0answers
26 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 ...
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2answers
1k 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 ...
2
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2answers
36 views

Installation of Yosemite is interrupted by a white screen at ⅓ of progress bar

The loading of the installation from a Yosemite USB installer drive is interrupted by a blank screen about ⅓ into the progress bar. The same USB drive works on another (older) MacBook Pro. The ...
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1answer
152 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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0answers
207 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 ...
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0answers
8 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 ...
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0answers
32 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 ...
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0answers
13 views

Macbook pro 15" (discrete graphics) late 2013 on OS X 10.10.3 keeps returning to login screen

Can log into safe boot without issue. Created a new admin account through safe boot but upon first full login into the new account the same behaviour as in the title showed up instantly. Have tried ...
0
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1answer
18 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 ...
2
votes
1answer
2k views

Macbook boots up to grey 'prohibited' symbol

I'm having an issue with my '09 13" Macbook Pro. When I boot it up, it seems to be booting normally until about thirty seconds in, when the Apple symbol is replaced with a kind of 'no-smoking' symbol, ...
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2answers
12k views

Macbook Pro Crashing and Startup Failure

Firstly, some background information for the problem: My girlfriend's Macbook Pro had an issue that was annoying, but not fatal. Roughly once a day (but sometimes not for a few days, and sometimes ...
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1answer
2k views

Macbook Pro hangs when booting into Boot Camp Windows 7

I have a 2011 Macbook Pro 15" 10.7.4 with Windows 7 installed in Boot Camp. A few days ago, I tried to boot into Windows 7 and it just froze after I selected the Boot Camp volume on the Select Drive ...
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1answer
81 views

Can I stop my Macbook Pro booting into Windows automatically?

I've got my Macbook Pro (early 2015) set up with Boot Camp. Normally, when I switch it on, OS X starts. But I can press Alt/Option to get the boot menu, and select Boot Camp Windows from there. Once ...
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2answers
8k 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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0answers
8 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 ...
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0answers
10 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 ...
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1answer
61 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 ...
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0answers
3k 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 ...
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2answers
143k 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 ...
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0answers
24 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 ...
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0answers
11 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 ...
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2answers
6k 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 ...
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2answers
3k views

Resetting MBR on iMac

I installed Ubuntu on my iMac (partially successfully) I had rEFIT installed but it did not recognize the Ubuntu installation. I removed the partition and rEFIT and now when I attempt to install ...
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2answers
32k views

What are next steps when fsck reports “could not be repaired after 3 attempts”?

My Mac Book Pro 13.-" doesn´t get past the grey booting screen with the apple and the spinning wheel (The loading bar appears but when it´s done nothing happens) I have 220 GB in one single ...
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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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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 ...
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1answer
2k views

Can't boot MacBook Pro 13" (mid 2010)

The problem occurred after installing the update SMC 1.6 on Apple - OS X Mountain Lion: First for a long time was a white screen and noisy cooler After the system battery icon was crossed out and ...
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1answer
235 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 ...
3
votes
3answers
8k 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 ...
0
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1answer
41 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 ...
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0answers
46 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 ...
2
votes
1answer
1k views

Unusually long boot time in non-verbose mode - early 2008 MBP + SSD + Mavericks

Inside my early 2008 MBP (15", C2D 2.4, 4GB, GF8600M) I installed a used Samsung SSD (128GB), did a clean Mavericks install and at first startup, I restored the Applications, Desktop, Documents etc. ...
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1answer
42 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 ...
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1answer
3k views

I can't boot into Windows 7 on Boot Camp

I have a mid-2009 MBP. A couple of years ago I swapped out the optical drive for an SSD, made the original hard drive a Boot Camp partition and installed Windows 7 on it. It has been a brilliant "best ...
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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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2answers
3k views

Mac Pro: Kernel panic during HDD boot and DVD boot

I have a 2007 Mac Pro (OS X Tiger 10.4.11) that cannot boot up anymore since a few days. I see the grey screen with the apple logo and the rotating circle. After a minute or so I get a kernel panic. ...
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1answer
2k views

Mac Pro hangs at startup showing white screen with spinning pie wheel

MacPro 1,1; lion? startup hard drive failed (with loud buzzing). Removed bad drive, installed replacement, inserted Lion USB drive, verified new drive using the Lion usb drive, started installation ...
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votes
4answers
39k 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
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0answers
41 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 ...
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1answer
1k views

Serious Boot / Sleep Problems

Two days ays ago I closed the lid of my macbook pre for the night as I have done for the last 2.5 years but when I opened the lid in the morning the screen didn't show. It seemed to be 'alive' (ish) ...
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1answer
47 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 ...
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1answer
1k 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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0answers
89 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 ...
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0answers
83 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 ...