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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4answers
35k 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
0answers
18 views

Cannot boot into offline recovery partition in El capitan

I removed Boot Camp, then every time I use CommandR my Macbook Air starts Internet recovery. The weird thing is that the recovery partition is still there. Note my Internet connection is only ...
0
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0answers
11 views

Problem Installing Kali Dual Boot on Mac OS X El Capitan

I've tried installing Kali by installing refind, reverting my CoreStorage main partition, resizing it to free 30 GB, and burning the Kali ISO to a USB using the Mac Linux USB Loader. However, when I ...
7
votes
4answers
418 views

How long to hold key combinations when booting a Mac?

I can't believe no one has ever asked this, but I can't seem to find it: How long should you hold down key combinations, such as Command + S, while your Mac is booting? I can get this iMac to boot ...
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 ...
12
votes
8answers
38k 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
13 views

No bootable device, insert boot disk (Windows 7 already installed)

Recently I installed Windows 7 Ultimate via Boot Camp Assistant on my MacBook Pro and everything was going alright. I wanted to share files between my two operating systems so I created a fat32 disk ...
0
votes
0answers
29 views

SSD not working internally

I recently bought a Corsair Force LE 240GB SSD and tried to do a net recovery on a macbook pro A1278 (MacBook Pro 13" Early 2011 with i5) to the latest El Capitan, but for some reason, this is only ...
0
votes
3answers
3k views

“You restarted/Computer restarted because of a problem” on wakeup, Evernote?

For the last few days I've been getting scared because of these messages that appear very frequently on wakeup, and almost always when I wakeup after a long duration. Sometimes it says "you restarted ...
1
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0answers
22 views

refind : No bootable device (Mac and linux)

I just make dual boot on my macbook pro with linux fedora. when I enter linux on refind menu, it says "no bootable device -- insert boot disk and press any key". I know this question has been ...
1
vote
0answers
40 views

Cannot boot into OS X after partitoning

I have installed Ubuntu on a Mac Mini, everything works great. I'm able to switch back and forth without any problems. After that, I used GParted in Ubuntu to resize the OS X partition. I then create ...
3
votes
1answer
2k views

MBPr with El Capitan freezes at or right after login

Here's the problem: my colleague has a MacBook Pro Retina with El Capitan installed and he's been having issues with regular freezes lately. Everything has worked fine under Mavericks for well over a ...
2
votes
1answer
2k 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 ...
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
1answer
17 views

Trouble to boot into OSX after install windows 10 on MacBook pro

Before this problem win + OSX worked fine. But I tried to settings>recovery>Advance Startup from windows. after a restart , there is no two boot option . only windows boot option is appear. But how ...
2
votes
1answer
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. ...
1
vote
1answer
3k 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
1answer
41 views

Can't see Apple_HFS partition after using Minitool Partition Wizard

I tried to reduce my partition size using Minitool Partition Wizard on my BOOTCAMP partition (I didn't touch Apple_HFS partition) now I can't see my Apple_HFS partition in Disk Utility. However this ...
0
votes
2answers
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
0answers
12 views

Minimum requirements for Mac Book Pro Core2Duo to boot

I got an older Macbook Pro as a present, without battery and harddisk. Memory is installed, LED power adapter is on. Since the machine doesn't boot, my question is if I have to install harddisk or ...
1
vote
3answers
2k 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
0answers
30 views

Boot Issues After Boot Camp

Note: I apologize about the excessive use of abbreviations, my phone is my only Internet access right now I recently used Boot Camp to install Windows 10 on a partition of my MacBook Pro from mid ...
0
votes
0answers
17 views

How can I boot a WinPE USB on a Macbook? [duplicate]

I have a 2008 Macbook Pro with OS X Yosemite and Windows 7 on a bootcamp partition. Yesterday while trying to create another partition (in windows) I accidently converted my basic disk of primary ...
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
0answers
28 views

Lion to El Capitan upgrade stuck on restart

I'm upgraded an late-2011 MacBook Pro from Lion to El Capitan. The install itself seemed to go fine. It got to the step where it restarts after the install and now it just hangs on this screen. ...
6
votes
3answers
37k views

Boot camp install of Windows 7 issue, no bootable devices

So I have a 2010 15" macbook pro (MBP6,1) and I replaced the optical drive with a hard disk. I wanted to install windows 7 on the hard disk with boot camp with a USB and ISO image. After searching I ...
1
vote
2answers
168 views

EFI Boot Frozen When Trying to Install Windows 8.1

I am trying to install Windows 8.1 in Bootcamp on my Mac Pro Early 2009 Edition which should be possible according to this page: https://support.apple.com/en-ap/HT201457 I went through all of the ...
0
votes
0answers
152 views

Grub Rescue on Mac

I have a problem: yesterday I installed Kali Linux 2.0 on my Macbook air (runs El Capitan). However, after managing to run it, and exiting it, i couldn't find Kali on my laptop anymore. I forgot to ...
0
votes
0answers
23 views

kernel extension is not always loaded at boot time on OSX

I do have a kernel extension for USB-Devices using IOKitPersonalities. Replugging one of the devices the kext will always be loaded as expected but for devices already connected at startup this ...
0
votes
1answer
5k 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 ...
2
votes
2answers
707 views

Mac won't boot from USB drive: Prohibited sign

I tried to clean install OS X El Capitan on my Mac, but it won't boot from the USB drive. Here are the steps I took to create the bootable USB drive: (I have a mid 2014 MacBook Pro with Retina ...
0
votes
1answer
25 views

unable to boot Mac OS after installing bootcamp

Installed bootcamp Win7 on my MBPro with Yosemite a couple weeks ago and both OS's worked fine for some time, until recently the Mac OS suddenly decided it couldn't boot anymore. If I select the Mac ...
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 ...
13
votes
5answers
3k views

Installing 20+ operating systems on Mac without any virtualization

For a scientific project I need to install these operating systems on my Mac Pro. The catch is... It has to run on a native hardware, no level 1 or 2 virtualization is allowed. Here is the list of ...
3
votes
1answer
12k 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 ...
1
vote
2answers
222 views

What font is used to print a verbose mode boot?

When booting OS X in verbose mode (⌘V), the log is printed on screen. It seems different to the kernel font, but it might just be a smaller version of it. inverted screenshot Yosemite 10.10.1 ...
0
votes
3answers
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. ...
1
vote
1answer
56 views

OS volume shows as type 'FFFFFFFF-FFFF-FFFF-FFFFFFFF' after attempting to delete some Linux partitions—cannot log in

I was unable to just delete the partitions left by an old Linux Mint installation by pressing the '-' button in disk utility. I looked online and read that I could reformat them to a journaled format ...
0
votes
1answer
486 views

Hard drive boots over USB but not when install internally

I am trying to upgrade from a 500GB HD (http://www.newegg.com/Product/Product.aspx?Item=N82E16822136314) to a 1TB HD (http://www.newegg.com/Product/Product.aspx?Item=N82E16822152291). The only spec ...
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
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
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
1answer
41 views

2012 Macbook Pro Boots With Startup Sound, But Has Black Screen

This is sorta urgent, since my dad's whole business relies on his computer, and it needs to be fixed. Anyway, it will startup and and make the mac "on" chime. But after that, nothing happens. We can ...
8
votes
4answers
30k 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
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 ...
1
vote
0answers
57 views

Boot Windows from USB with EFI password

I've created an USB with Windows 10 from where I can boot: Restart pressing option. Select USB EFI partition. Windows starts. When EFI password is active it will be asked when booting pressing the ...
0
votes
1answer
51 views

NTFS appears every time

Every time I boot my Mac, an "NTFS for Mac OS X" window appears. In the settings I can't change this. Here is the window I have El capitan 10.11.4 I found this: To resolve the issue you need ...
0
votes
0answers
130 views

'the 'grub-efi-amd64-signed' package failed to install into /target/' during Linux Mint installation on an iMac

I have a Mid 2007 iMac, I've installed rEfind on the mac and the Linux Mint (Cinnamon 17.3) installer on an USB thumb drive . rEfind sees the USB thumb drive, sees grub installed on the key, I boot ...
4
votes
1answer
4k 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 ...
2
votes
1answer
5k views

unable to boot my Mac book after file vault 2 activation

after activation of file vault 2 I am unable to boot my computer, the apple sign turns into a prohibitory sign with a spinning circle beneath it , that spins forever. I really need the data on this ...