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

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0
votes
1answer
36 views

Thin green lines on boot, then screen goes grey (late 2011 MBP - 8,2)?

Last night I was using my late 2012 MBP (higher res screen, dual intel/amd graphics), and the screen suddenly went black. I left it go for a minute - no change. I open and closed the lid - it ...
2
votes
0answers
39 views

Unable to Boot MacBook using any means after attempted Fedora Install

Wondering if anyone has any last ditch efforts I can try here to salvage my macbook! I recently attempted to install fedora to dual boot on my Late 2011 Macbook Pro, the install crashed, the ...
0
votes
1answer
2k views

MacBook Pro stuck in gray screen when booting

I've got a Late-2011 15" MacBook Pro stuck in the gray screen when booting AFTER login. I've tried removing the drive (it's non-retina) and booting from a working bootable Yosemite installer, no luck. ...
0
votes
3answers
1k views

Can't boot on OS X partition after resizing Windows partition

I initially had three bootable partitions: OS X Recovery for OS X Bootcamp (Windows 8) Now, on Windows, I decided to make my Windows partition smaller, reducing its size using the native Disk ...
0
votes
2answers
1k views

OSX El Capitan - cannot make bootable usb stick with boot camp

I meticulously followed this tutorial, and this worked for me in 2014. I have a 4GB usb stick plugged into the computer. It should be enough for windows 7, a partition which no longer boots and I am ...
2
votes
3answers
34k 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
votes
0answers
24 views

Cannot change startup disk - Yosemite

I've got a clean install of Yosemite on a brand new hard drive. All good, up and running (got to boot to it manually). As the title says, I can't get the system to boot from this hard drive. Error ...
1
vote
3answers
30k 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 ...
0
votes
1answer
36 views

Don't want my hard drive to die again!

A couple of months ago, my Mac Book Pro wouldn't start up - it would make it halfway through and then power down. I took it to the repair store, and they said the hard drive was broken, and they ...
0
votes
0answers
27 views

MacBook freezes and can't restart without PRAM reset

I have a Mid 2012 13-inch MacBook Pro and am running OS X Version 10.11.2 (El Capitan). When my problem first occurred, I was running Yosemite. Here's the short story: my screen will occasionally ...
2
votes
2answers
4k 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 ...
0
votes
0answers
33 views

Boot Camp Assistant - Windows dosen't show up on boot!

I followed all steps to get Windows 7 on my Mac with Boot Camp Assistant and everything was working out until I was finished creating a BOOTCAMP partition and when my Mac restarted it said "No ...
0
votes
1answer
32 views

Mac Pro custom graphic black screen during boot

My 1st gen MacPro with a custom graphic card (ATI Radeon) does not show any boot prompt. Actually it doesn't show anything until Aqua comes up. I need boot prompts and pre GUI screens for multiple ...
0
votes
0answers
17 views

Imac 27" EMC 2546 boot issue (stalls boot at ~30%)

I've seen somewhat similar other such issues on many posts, but nothing that gives me a workable solution to my boot issue, so here is what's happening: Imac 27" late 2012 EMC 2546, with the recalled ...
0
votes
1answer
106 views

Mac book Pro [2011 model] - Screen bit distorted and greenish tint and does not boot completely after the apple logo and progress bar loads

My Macbook Pro hung so I forced restarted it but on restart the screen was bit distorted and had greenish tint (Picture below) also it never goes past the Apple logo and progress bar to boot ...
2
votes
2answers
2k views

BuildError(): error building a user of type

I'm getting a strange message each time I boot. For a quick second before the Apple Logo appears I see the text: BuildError(): error building a user of type 0x20010008 Then the Logo appears, and ...
0
votes
1answer
32 views

How do I instal OS X when boot combos don't work?

I'm trying to instal OS X on a 2013 Macbook Air. I erased the OS X partition, the computer is booting to my windows 7 bootcamp partition by default. All boot key combinations(C, Option, CMD+Option+R, ...
0
votes
1answer
63 views

What is it that prevents using a 3rd party SSD in a 2015 rMBP?

I bought an Early 2015 MacBook Pro Retina model with the 128GB SSD and have been wondering what to do if I need more disk space.. then I found out that it's currently not quite possible to just stick ...
0
votes
0answers
16 views

Create bootable windows on external HDD

Hello I'm trying to create bootable windows on this external HDD http://www.amazon.com/dp/B0046A8MSM/ref=twister_B004DTS99S?_encoding=UTF8&psc=1 but without success. I'm following this tutorial ...
0
votes
0answers
44 views

Issue with OS X Startup Disk in System Preferences when using EFI dual boot

I have Windows booting EFI on my Mac mini (Late 2012). It has two physical drives with one EFI partition (on the OS X disk). If I option boot I see OS X and EFI (Windows) choices and everything works ...
3
votes
4answers
6k views

How to properly install Kali Linux on MacBook Air (dual-boot with El Capitan)

I updated to El Capitan yesterday (on MacBook Air 2014). I then decided to install Kali Linux 2.0, and boy it's been one problem after another, so far nothing has gone the way it's supposed to. ...
5
votes
4answers
17k views

How do I get rEFInd working with OS X 10.11 El Capitan?

I noticed that I could not install and use rEFInd after upgrading to OS X 10.11 El Capitan. This restricts me to OS X so I cannot boot my Linux partition. I get the following error: error "Could not ...
0
votes
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) ...
0
votes
1answer
3k views

How to run Apple Hardware Test with broken keyboard?

mid-2011 13" MBA running Yosemite Coffee spill has left keyboard of mid-2011 13" MBA non-functioning. Even power button doesn't work, I boot by shorting the two solder points on logic board. I've ...
0
votes
2answers
53 views

2007 Macbook Pro will not boot to HDD

I have a 2007 MacBook Pro running Yosemite from an off the net upgrade from Snow Leopard and the graphics went crazy while trying to watch a TV program on my Slingbox app. I forced a shut down by ...
1
vote
3answers
3k views

iMac gets stuck on the “White Screen of Death” during startup

I have a 27" iMac (from 2011) that's running Yosemite and each time I turn the power on, it shows me the Apple logo, it starts to load, and the screen goes white and simply hangs there. To solve this ...
5
votes
2answers
54k 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 ...
0
votes
0answers
22 views

MacBook Pro Boots only with a pressed key

I'm having a bizarre issue with my early 2011 Macbook 15'. I grabbed it today without battery power só the first thing I diz was to plug the MagSafe adapter. Afterwards I pressed the power button. It ...
0
votes
1answer
9 views

DVD stuck in 2006 iMac, won't boot

So I put a DVD in and it wouldn't come out. I wanted to try the "hold left mouse during start up" method of getting it out and now it won't boot and I can still not get the DVD out. It is my GF's old ...
0
votes
1answer
31k views

White MacBook hangs at gray Apple screen forever, won't boot to single user, won't mount using Disk Utility. What do I do next?

After a forced shutdown, my white MacBook hangs at the gray screen with the Apple logo and an infinitely spinning progress wheel. I can boot in verbose mode, but I didn't see any particular error, ...
0
votes
2answers
47 views

Installing Microsoft Windows VM on OS X

I'm kinda new to the Mac OS, in fact I got this current Mac this week so I'm pretty noob with it. I need to run a VM with windows 11 and 10 for testing purposes. So I downloaded and the virtual ...
0
votes
1answer
32 views

MacBook air is messed up, can't erase the hard drive from recovery

Something happened when installing El Capitan and now I have only one partition in my hard drive with only 30 gigs of space when it's supposed to be 128. I can't seem to erase anything. Any advice?
0
votes
2answers
3k 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
21 views

Macbook pro keep on rebooting after Windows 7 installation while booting

I recently purchased Macbook pro 13inch early 2012 edition and wanted to dual boot windows 7 and Mac OS. After Googling, followed the below links and was able to successfully install WIn7 ...
1
vote
0answers
32 views

I can't boot my iMac to Mac OS X

I have Windows (Boot Camp) installed. So I ran out of storage and thought about partitioning my Mac's part of drive. I partitioned my Mac's drive and set Windows to boot by default. Once I lost ...
0
votes
0answers
43 views

Mavericks Login Screen Gone, Black screen with white dash upper left corner

Two weeks ago I was cleaning my system from old and unused drivers and leftovers and it looks like that I deleted something that was crucial. Using UninstallPKG I removed unused Printer drivers, Old ...
0
votes
0answers
34 views

EFI Boot icon on startup menu

I completely removed Boot Camp partition from my MBP (by DiskUtil). Everything is OK, but now when I start the system with the boot menu I see the "EFI Boot" icon instead "Windows" drive. What does it ...
0
votes
1answer
51 views

Entering in recovery system trouble

When I'm trying to enter in recovery system through pressing cmd+R I'm getting OS X Internet Recovery instead of Utilites window. How to avoid it?
2
votes
5answers
1k 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 ...
0
votes
1answer
79 views

Windows 10 will not boot anymore

Urgent! I have an existing Windows 10 installation via Bootcamp which has been on my Mac for months without issue. However for ages I have been wanting to read my Mac partition from Windows which it ...
0
votes
0answers
57 views

Cannot either mount or repair greyed out partition

As a likely symptom, I started boot camp earlier in today to install a dual boot Windows on my machine and the install/remove Windows option was greyed out and I could not select it. After that, I ...
0
votes
0answers
32 views

MacBook Pro stuck on login

I know that this question has been answered before, but none of them seemed to help me. My situation is as follows: I was running MatLab and had too many figures open (like 40, and Matlab always lags ...
0
votes
1answer
46 views

Boot Into Recovery Partition After Installing Linux.

I want to install Linux on my mid 2014 Macbook Pro for educational purposes. However, I don't want this to be permanent. I've tried to partition the hard drive and install both OSs but I have not ...
0
votes
1answer
57 views

Macbook Pro late 2011 version won´t boot up

Hi guys I have been searching the forum and haven´t seen a solution to my problem therefore i will start by explaining what happened. Last night all of a sudden my mac froze, the mouse would move but ...
0
votes
0answers
71 views

Anyone knows how to fix Module wl Not found? t

Does anyone know how to go around fixing: Fatal: module wl not found I get this when I insert into terminal: modprobe wl on Kali linux 2.0 that I dual booted to my Macbook air El capitan. ...
2
votes
2answers
3k 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 ...
0
votes
0answers
2k views

Windows 10 partition no longer boots after El Capitan upgrade

I have a triple boot MacBook Pro (mid-2014 model) with separate partitions for Mac OS X, Ubuntu Linux, and Windows 10 (recently upgraded, without any issues, from Windows 8.1). Before, everything ...
4
votes
4answers
6k views

Mac won't boot: Way to mount drive and delete one file?

My macbook is currently a brick. I added a /etc/launchctl.conf file that must be malformed. The OS now crashes even when attempting to start in safe mode: "launchd System bootstrapper has crashed: ...
0
votes
0answers
12 views

Under what circumstances would the startup chime enable itself?

After doing some reformatting/reinstalling a couple a weeks ago, the startup chime on my Macbook has never gone off when I turn it on for the past few weeks. However, when I tuned on my Macbook Pro ...
0
votes
1answer
24 views

Splitting Partition On External Drive

I have a 1TB external drive with three partitions: FAT32 for extra storage (~500GB) Ubuntu (~499GB) Linux swap space (~1GB) I want to boot to rEFind and then to Ubuntu from any Mac; preferably ...