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

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0answers
31 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, ...
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0answers
52 views

Debug why USB drive is ignored as a bootable device?

I created a USB drive with 'El Capitan' on it, as described here, which uses mostly these directions, "option 2: Use Disk Utility." I now have a USB key with "Mac OS Extended" format and 7.8G of ...
1
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2answers
5k views

El Capitan frozen boot process

Just thinking: I have been reading a "lot" of users who's system just did not starts once it has been turned off or after a restar command. Some things in common: Virtual machines, Boot camp, multiple ...
7
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4answers
27k 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 ...
1
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1answer
787 views

Cannot mount bootable Windows 10 drive

I am trying to make a bootable USB with the dd command since Boot Camp does not work. If I execute this command: sudo dd if=Win10.iso of=/dev/disk1 bs=1m I get a disk formatted as Universal Disk ...
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0answers
117 views

Can't get Windows to boot after editing partitions

When I attempt to boot Windows I get the error 0xc000000e. This happened after I made a partition in Windows and then deleted it in Mac OS. Here's my current set up. Is it possible to repair it using ...
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2answers
83 views

MacBook not turning on (fan loop)

I'm in a very frustrating situation of having my MacBook Pro 15' Retina (A1398) stuck in a boot loop. Well, not exactly boot loop: when I connect my MagSafe charger, it goes in a constant cycle of ...
4
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2answers
1k 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 ...
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0answers
137 views

Bluetooth mouse won't work on FileVault 2 machine until after login

On a machine with FileVault 2 enabled, my Apple Magic Mouse does not work until after I log in. After login, the mouse works and I can tell from IORegistryExplorer that /System ...
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0answers
401 views

How to use Testdisk under OS X recovery mode?

I accidentally broke the GUID, I suppose, when I was trying to solve the incorrect EFI partition problem. What I have now is: Disk1 is a 4 GB thumb drive with a recovery partition (disk1s2) I ...
0
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1answer
33 views

5 Minute Yosemite Boot Time?

My spring 2011 Macbook Pro with 5400 rpm drive takes 5 minutes from pressing the on button to boot. I have about 400 GB of RAW and NEF (Nikon camera) files and only Photoshop and Lightroom installed. ...
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0answers
64 views

Can't boot after Yosemite Update

Here's my setup: Macbook Pro 7,1 Mid--2010 10GB RAM (1 8gb + 1 2gb) 1TB Toshiba HDD OS X Yosemite 10.10.0 installed beside Windows 7 32 Here's my issue: I installed the ...
1
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2answers
1k views

What does a non-booting macbook displaying a lightning bolt mean?

I returned to my MacBook after a few days of not using it, and there was a message that the system had run out of application memory (weird...). So, I followed the recommendation and Force Quit a ...
0
votes
1answer
510 views

How to change the GPT partition type of an EFI partition?

I have a perplexing problem with the EFI partition on my boot SSD. The GPT partition type is "Microsoft Basic Data". On all other drives in my system, including my Carbon Copy Cloner clone of my boot ...
0
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0answers
264 views

SSD doesn't boot anymore when plugged inside Macbook Pro

I've got two hard-drives in my Macbook. A SSD (connected to the original hard-drive connector) and another drive connected to the optical drive bay with a kit. Since this weekend I can't boot from ...
0
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1answer
408 views

Mac Pro 3.1 with Yosemite won't boot after GenericUSBXHCI USB 3.0 .kext added

I was trying to install drivers for my NEC USB 3.0 PCI card. ( propably http://sourceforge.net/projects/genericusbxhci/files/ or https://github.com/RehabMan/OS-X-Generic-USB3 ) I rebooted my mac into ...
0
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1answer
124 views

Boot from external USB3

I've recently bought an usb3 flash drive where I've put a live kali linux distribution. When I try to boot my early 2015 mac book pro (with Yosemite) from this usb3 drive I have two options: windows ...
0
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0answers
162 views

iPhone: Reset auto boot flag in Bootloader using iRecovery

I was using a iPhone 3G (jailbroken) and recently it got struck with showing iTunes + Cable Icon to do the restore. I had used iRecovery under Ubuntu 14.04 and enter into interactive shell using -s ...
0
votes
1answer
39 views

MBP freezes for 30 seconds all the time since this afternoon

I'm looking to find the cause why I'm getting the spinning beachball on my MBPro all the time since this afternoon. I can work for like 30 seconds and get a spinning beachball for like 30 seconds. ...
0
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2answers
637 views

iPhone won't boot after installing IOS9

I downloaded IOS9 with the phone and went through the the location service and other yes/no screens. I got to the screen that said lets get started and after that I just got the Apple logo and a ...
0
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0answers
19 views

Set a startup screen language different to the original one

When I bought my MBA I set the system language to "Spanish". My problem is that I need the english keyboard configuration in the startup screen to log in, and I don't want to be changing the keyboard ...
0
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0answers
279 views

MacBook Pro (A1278) gets stuck at startup (Verbose, Single User, Recovery…)

When trying to start my Macbook, it stops at the Apple logo with spinning gear or progress bar. I've tried Safe Mode, but it got stuck at the same point. Command + V, Command + S, Command + R = Not ...
0
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1answer
30 views

iPad mini retina doesn't boot

My iPad shows the Apple logo, and then it turns off. I tried reinstalling iOS with iTunes (update) and it returned error 27? Any ideas of what to do?
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0answers
63 views

Bootcamp no longer bootable after I fixed GPT/MBR mismatch error

I had an error which prevented me from upgrading my system, so I did a few commands with gdisk to fix it, but now bootcamp is no longer bootable. When I boot into it, (it doesn't appear when holding ...
1
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1answer
500 views

OS X 10.11 GM Candidate 1 left my Mac unable to boot

I tried to install the OS X 10.11 GM to my 2012 Macbook Air, and it crashed during the install. I tried to go into recovery mode to reinstall OS X, but once I put in my Wifi password and press the ...
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0answers
129 views

iMac startup manager not displaying

I have an iMac 27" from late 2009 and I'm trying to fix it but everything I've tried thus far doesn't help. I don't have an Apple keyboard but a normal keyboard should work as well. When turning the ...
0
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1answer
132 views

Ubuntu Bootable DVD created with a MacBookPro9.1 is not recognized

I followed http://www.ubuntu.com/download/desktop/burn-a-dvd-on-mac-osx to create a bootable UBUNTU DVD with my MacBook Pro9.1 (OS X Yosemite 10.10.5). I ended all the steps but I cannot boot such ...
3
votes
2answers
4k 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
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0answers
131 views

Macbook Pro Boots Only Halfway

The Macbook Pro in question is a mid-2011 model. It runs OS X Yosemite (10.10) and a Bootcamp-enabled Windows 8.1. The last significant actions performed on it included updating certain Eclipse IDE ...
0
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1answer
124 views

Macbook boot problems - 1 long beep, then nothing, then it's fine

My girlfriend's Macbook (white unibody 2010) is having some problems booting. It can be erratic, but it generally seems to follow this pattern: Turn it on, 1 long deep beep, and then nothing (light ...
1
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0answers
28 views

Early 2011 15" Macbook Pro running Windows 7, front USB port misbehaves

I have an early 2011 15" MacBook Pro on which I primarily use Bootcamp & Windows 7. The front USB port works well using OSX but under Windows, it thinks any storage device lugged into it is an ...
1
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3answers
2k views

My Mac Pro 1,1 won't boot from any type of usb stick

I tried to install several unsupported versions of OS X on my Mac Pro 1,1 but no matter which method I use, after choosing the usb device in the boot manager the mac would just boot into os x lion as ...
0
votes
4answers
332 views

How to extract files from a broken non-bootable OS X without reinstalling OS X?

What can I download/install onto a USB drive, have it boot off that USB drive and then copy the files I need to another USB flash drive? The error message I get when booting is "Missing Operating ...
7
votes
4answers
410 views

How long to hold key combinations when booting 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 ...
2
votes
2answers
179 views

Kali Linux auto boot

I have just installed Kali Linux in a separate partition of an iMac with wireless keyboard and mouse and with rEFInd. When I turn on the Mac it boots into Kali Linux automatically and doesn't ...
1
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1answer
218 views

iPad stuck in boot up loop. 4013 error after multiple restore attempts

After speaking with Apple's tech support, and having them perform a data capture on my machine, I sit stuck with an iPad that won't boot up. I've attempted all trouble shooting listed here. I've ...
1
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1answer
299 views

Problem after cloning a Mac with dual boot

I bought an SSD to upgrade my MacBookPro (late 2011) and have cloned the HDD with CloneZilla. I have dual boot with OS X Yosemite and Windows 7 Pro. However, now on the SSD, I can't boot into the ...
-1
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2answers
4k views

How to make a bootable external hard drive and boot up a Mac? [duplicate]

I have an iMac 27 inch, and one summer the room temperature was up to 40C, and I came home that day, and the hard drive was really slow. I then rebooted the machine and it took something like 8 ...
1
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2answers
42 views

Blinking folder icon - safeboot, recovery hd does not work

When I try to start my MBP early 2011 with Mavericks OS installed I get a blinking folder icon. SMC reset, PRAM reset did not resolve the issue. The MBP does not boot into the safe mode too. When I ...
2
votes
1answer
89 views

White prohibitory sign on Startup

Have the white prohibitory sign when trying to boot up MBP Retin 13" late 2012 running Yosemite. Have tried resetting PRAM (cmd + alt + p + r) and disk utility has been to no avail so far. Have tried ...
0
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0answers
152 views

Installing Windows 7 on a MacBook Air, Early 2015 [duplicate]

The issue: I have an issue with an MacBook Air that I need to install Windows 7 on. The problem is that this MacBook model does not support Windows 7 in Boot Camp. So I thought that I should instead ...
0
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1answer
434 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 ...
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votes
2answers
911 views

Why can't I boot to Disk Utility (iMac A1418) - It displays a lock and a password field?

Someone showed me their iMac that they recently bought second-hand. It boots normally to the login screen with the PIN (EDIT: it is a PIN and NOT a passcode; the message reads "Enter your system lock ...
0
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1answer
265 views

White Screen Hang Mac Pro

Reading related posts it seems I have a blend of other's issues. But the final blow was plugging in a nextbook tablet to download some pdf files, and THEN I booted the old Mac Pro 2008 with Yosemite ...
0
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1answer
256 views

Reboot fails after failed disk erase when restoring from Time Machine

I have an Early 2013 Macbook Pro Retina 15" with 512GB of SSD storage. My update to Yosemite 10.5 failed for some reason and I was left with an unbootable system and severe file system errors that ...
2
votes
2answers
3k views

Bootcamp Windows 7 installation, USB is not recognized only on bootloader

I'll abstract my question. I'm using MacPro4,1 Early 2009. And I'm trying to install Windows 7 Professional x64 SP1. (I'm using Yosemite 10.10.4, and Boot Camp Assistant is 5.1.4) My Mac has 2 HDDs, ...
0
votes
0answers
128 views

Late 2013 13" retina MBP freezes when using its own display (OS X 10.10.3)

I am having some serious problems with this machine. Its own display remains dark, but when attaching another display, I see it load the Apple logo on a black screen and then freeze on the white ...
2
votes
2answers
354 views

How to install Windows 8 on a MacBook Pro with OS X Yosemite, using Boot Camp, without a USB drive or DVD

The title covers most of my question. I am relatively new to the Mac world, and came across Boot Camp, which can dual-boot Windows, which seems pretty cool. I have read through many Boot Camp guides, ...
1
vote
3answers
8k 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
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0answers
34 views

RE:Boot hangs on grey screen

I followed the advice from this page Boot hangs on grey screen (even when booting from USB drive with fresh OS X install) It worked though as I could log in my system but the graphic is dull and slow ...