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

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1
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1answer
447 views

Boot from usb take forever

Recently I made the stupid mistake of erasing MacBook Pro (2012) HDD without immediately installing OS X. And now it can't even boot or get to recovery utilities. So I decided to make a bootable OS X ...
9
votes
5answers
35k 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 ...
3
votes
5answers
18k views

Why would my iPhone 6 be stuck in a dead battery boot loop?

Okay, so I have a problem. My iPhone 6 died (it runs a non-jailbroken version of iOS, I used it as a test device for development applications, but I didn't do anything crazy with the firmware of the ...
0
votes
2answers
10 views

how to access Macbook Pro hard drive after network boot (OptCmd-R)

My mac won't boot. I need to re-install OS. But hard disk is too full, so I need to delete some files. I boot Opt-Cmd-R then open menu > Utilities > Terminal but bash shell only shows boot partition ...
0
votes
0answers
5 views

after boot, macbook white apple and status bar briefly display every 10.0 seconds then go black

PRESENTLY: My MacBook Pro won't boot up. Screen is totally black, except that exactly every 10 seconds it BRIEFLY re-displays white apple, full white horizontal status bar, and the spin gear below. ...
1
vote
1answer
3k views

No bootable device after failed Windows 7 installation via Bootcamp

While trying to install Windows 7 via Bootcamp on my MBP Retina today I really messed up. After getting into the drive selection in the Windows installation utility I deleted the other partitions (3 ...
0
votes
0answers
11 views

Booting and Running Windows 7/10 from external USB [duplicate]

I have a 2013 MacBook Air (4GB/128GB). I do not have the resources for a virtual machine and do not want to partition the hard drive. Can I have Windows 7 or 10 on a 128GB USB 3 Flash Drive. I want ...
0
votes
1answer
2k views

OSX Yosemite bootable usb drive circle slash (“no” symbol)

I have a Late-2011 Macbook Pro (4GB RAM) that has been running slow for several OSX cycles, and since Mavericks it's been unbearable (spinning beachballs whenever you do anything). I tried upgrading ...
0
votes
1answer
91 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 ...
1
vote
1answer
37 views

Boot iMac from Macbook

The new MacBooks are the best But their processors are pretty anemic. Not a big deal when I'm out and about, but not great for serious work. What I'd like to do: Get an iMac with decent specs, ...
0
votes
0answers
17 views

Cannot boot into successful winclone restored windows

I restored a winclone image containing Windows 10 to a new partition on my machine. Everything went well, but after the process completed, I was not able to boot into the restored Windows. If I select ...
0
votes
1answer
13 views

Grey screen apple logo prohibitory sign etc MacBook 2009

I have an older Mac book that will not boot. I have tried all key commands including fcsk which resulted in a "mach kernel" end result, so nothing worked. I don't have a system install disk (bought ...
1
vote
0answers
20 views

MacBook Pro 2009, can't format/fresh install

So, i'm in a (bit of) a pinch. I was doing a format/fresh install of MacOS on my old 13-inch 2009 MacBook Pro going through OS X Utility and Reinstall OS X. Unfortunately when i do enter my Apple ...
0
votes
0answers
25 views

Black screen after chime before booting

I have a mid 2014 rMBP 13". When turning it on, I can hear the chime and then the screen remains black for a variable amount of time between 15-25 seconds. It doesn't always happen, the issue seems ...
0
votes
0answers
14 views

Can rEFInd startup from APFS volume? [on hold]

Supposing I'll update my iMac to Sierra, will it be possible to boot into macOS from the rEFInd boot manager - or not?
0
votes
2answers
2k views

Create a bootable USB with Windows installer for Yosemite?

I'm having trouble creating a bootable USB for my mac. I have an iMac, and I'm wanting to install a copy of Windows Server 2008 x86 onto it. I've tried BootCamp, but I'm getting errors when selecting ...
0
votes
0answers
12 views

What programs are run when in safe mode and waking up from sleep?

I have been having some terrible issues with my MacBook Pro Retina in that it randomly shuts down within 5 minutes of booting up. I seem to have isolated a problem free environment to safe mode ...
4
votes
1answer
5k 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 ...
0
votes
1answer
1k views

How to change boot picture of Windows partition?

On a MacBook with Bootcamp installed, I got three partitions: OS X 10.10 Windows 10 OS X Recovery On boot, with 'alt' key down, I get the bootloader and I can choose which partition to boot. On ...
2
votes
1answer
1k 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
13 views

Powering off/crashing during startup MacBook Pro mid 2009

I have a MacBook Pro mid 2009 that crashes during startup after the chime and once in a blue moon gets as far as the login screen before crashing. Crashes during safe reboot or recovery reboot too ...
0
votes
2answers
27 views

iMac 2009 frozen on boot screen

This morning I needed to reset an administrator's account password on my Mac, because I had forgotten the password. I used the steps listed on this article to accomplish this, but after restarting ...
0
votes
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 ...
0
votes
1answer
47 views

Macbook 2016 shutdowns during start, safe mode working

I bought an Apple Macbook with Retina display (Core M, 8GB RAM, 512GB SSD) and today I was experiencing the first problem with it. I was unable to log in to my account. During the login process mac ...
2
votes
1answer
3k 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 ...
0
votes
1answer
36 views

How to repair a drive after accidentally changing the partition scheme?

I was using the Boot Camp. Somehow I managed to change the GPT partition scheme on my external hard drive to a MBR partition scheme. Below is the output from the command sudo gpt -r -vvv show /dev/...
0
votes
0answers
35 views

Boot Loop - Trying to make a Yosemite KVM VM w/Chameleon Bootloader

I am trying to boot a Yosemite VM (10.10.5) following these instructions here. But it gets stuck in a loop at the BIOS boot screen (the OS has not yet been installed) My hardware is a Mac mini with ...
12
votes
9answers
41k 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
votes
1answer
29 views

How to repair bootcamp after partitioning for triple boot

I already had El Capitan and Windows running smoothly. I needed to add a partition so I could triple boot into Ubuntu. OS X and Ubuntu both work perfectly now but my Boot Camp side seems to have ...
1
vote
1answer
34 views

Does OS X El Capitan have a /boot folder

I know that the /boot folder contains the static files of the 'boot' loader. I'm just curious to why I can't see this folder on my Mac. Im using OS X El Capitan. Does OS X El Capitan have a /boot ...
1
vote
2answers
3k 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 ...
0
votes
1answer
12 views

Mac osX boot camp issue

i tried installing windows 8.1 on my mac osX and while the boot camp process was on the disk partitioning was in process and my mac suddenly restarted with a bootcamp error. now there is no windows8.1 ...
0
votes
0answers
29 views

MacBook Pro startup problems

My MacBook Pro 8,1 Late 2011 was working fine till yesterday. Current issue, 1 - it takes approximately 20 mins to start which goes like this: Then this happens: Then it gets stuck on this, ...
-3
votes
0answers
27 views

I raged at my Emac and deleted almost all of the system before coming to my senses. but by then i had deleted the kernel

I raged at my Emac and deleted almost all of the system before coming to my senses. but by then i had deleted the kernel. So I had to put linux ubuntu on a usb and when i held alt(option) it came up ...
0
votes
1answer
36 views

MacBook taking long time to load the boot loader; rEFInd freezes

I have a MacBook Pro 2015 and I am dual booting with Linux. I use rEFInd and since day 1 it has been working fine on most occasions. Sometimes it would take a long time to show its screen and then it ...
0
votes
1answer
27 views

Windows 10 No Boot Device

I made a bootable Windows 10 flash drive using Bootcamp on my MacBook. When bootcamp is finished with everything it restarts my computer like normal. But when it restarts so I can install Windows, it ...
0
votes
1answer
2k 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
0answers
30 views

EFI boot option not appearing on startup

I am trying to install an Ubuntu Server distro on my old disused iMac, however after creating a live USB on my macbook pro no EFI boot option appears. I also tried burining a version of the image to ...
1
vote
1answer
15 views

How can I check if a new hard disk is detected by Mac EFI at boot?

I have a Mac Mini (late 2012) and have added a new hard disk drive in it. But Mac OS 10.10.5 is unable to detect it. If this were a PC, I'd check the BIOS to see if it was detected and listed there, ...
2
votes
2answers
3k 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 ...
4
votes
2answers
2k views

Using the -Bless Command on Multiboot Macs with 10.11 El Capitan

As part of our standard deployment, we tend to deploy multiple OSs on Macs, from 10.7 to 10.11. However, with the new SIP (System Integrity Protection), the -bless command no longer works properly. I ...
3
votes
3answers
14k 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 ...
3
votes
1answer
63k views

Can't start up MacBook Pro from OS X install discs

I wanted to re-install my mid-2010 15-inch MacBook Pro (Intel Core i7 2.66 gHz 8 GB 1067 MHz DDR3 RAM) which is currently running Mac OS X 10.6.8. I inserted the retail Mac OS X 10.6 install disc, ...
0
votes
1answer
41 views

MacBook Pro will not boot, begins to load then hangs with white screen [duplicate]

I am unable to get my MacBook Pro to boot. It turns on, and the Apple logo + loading bar appear however after a minute or so of loading it eventually changes to a white/grey screen and just hangs. ...
0
votes
0answers
15 views

MacBook Pro Retina 15" late 2013 shuts down suddenly [duplicate]

I'm not sure how to post a diagnostic here so if you have any tip, tell me I will post it. I just got a MacBook Pro Retina 15" late 2013 that shuts down randomly without any warning. Sometimes it ...
0
votes
0answers
23 views

MacPro 3,1 (early 2008) won't start after crashing

I have a MacPro 3,1 (early 2008) with OS X Lion (updated). We were working on editing a movie with Final Cut Pro, then the screen went blinking and a kernel panic occurred. Since then, it is ...
0
votes
2answers
9k views

MacBook Pro won't boot with new hard drive, but a different MacBook Pro will

So here are the details. My friend and I both have 13-inch Mid 2010 MacBook Pro's. Same processor and specs since they were purchased at the same time, but originally had 250 GB hard drives. His hard ...
0
votes
0answers
20 views

Win2usb OS works on PC but not on MBP

I have a MBP with windows 7 64bit Bootcamp installed. I also have refind installed. I have a win2usb 1tb drive with a fresh windows 7 32bit installed and it boots up perfect on a test PC. Refind ...
2
votes
2answers
2k 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. ...
0
votes
1answer
6k 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 ...