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
466 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
votes
1answer
138 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
votes
0answers
201 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
40 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
votes
2answers
658 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
votes
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
votes
0answers
322 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
votes
1answer
32 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?
0
votes
0answers
67 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
vote
1answer
501 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 ...
0
votes
0answers
151 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
votes
1answer
153 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
6k 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
0answers
140 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
votes
1answer
149 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
vote
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
vote
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
455 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
426 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 ...
2
votes
2answers
199 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
vote
1answer
259 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
vote
1answer
363 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
votes
2answers
5k 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
vote
2answers
44 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
98 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
votes
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
votes
1answer
536 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 ...
-1
votes
2answers
1k 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
votes
1answer
307 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
votes
1answer
313 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
4k 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
138 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
393 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
13k 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
0answers
37 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 ...
0
votes
0answers
92 views

iMAC MC508LL/A new hard drive, cannot install from disc

I was trying to repair a friends iMac with a failed hard disc. I bought a 500GB 850Evo SSD to replace the failed hard disc and installed it using the OWC kit. Now I am trying to get it started up. I ...
0
votes
0answers
94 views

MacBook Pro Won't Boot. No Video. No Chime

I have a 2010ish MacBook Pro that was working fine this morning. I installed a new version of the Dropbox client and rebooted. It now won't boot up. No video, no chime. It does, however, hit the ...
0
votes
0answers
62 views

Early MacPro 2009 keeps needing SMC reset

My MacPro keeps needing to have its SMC reset to stop the video card putting my monitor to sleep when it switches from the logo screen to the desktop image during boot up. The problem seems to have ...
0
votes
0answers
64 views

Startup very slow (10.6 / 10.9)

My dev workstation (MBP 2012, 2.5Ghz i5, 16Gb, 500Gb HDD) is incredibly slow booting up to the point I'm terrified of rebooting it. Every now and again it crashes or refuses to wake (maybe once every ...
0
votes
0answers
50 views

MBP dramatically slowed over the weekend

I have my MBP (13" early-2011 i7) attached to an external screen (not in clamshell mode). I'm not sure what happened over the weekend but the MBP has been possessed somehow; first off it wouldn't wake ...
2
votes
1answer
93 views

How do I recover my data/OS after accidentally writing over my main hard drive with an img file using dd? [duplicate]

I accidentally wrote over main hard drive with an img file using dd. This thread is the similar but my case is that I accidentally wrote my main hard drive. I have a late 2013 MBP 13" Retina 256GB ...
0
votes
1answer
502 views

MacBook Pro Yosemite hangs during boot

My MacBook Pro froze earlier whilst using it, so I did a hard reboot. Ever since it won't boot up. It gets to the Apple logo with the white progress bar but the progress bar won't move past 20%, I've ...
0
votes
0answers
103 views

Can I boot from any USB DVD drive or only the SuperDrive

I went to Curry's today which is a electronics retailer and bought a Mac mini. I wanted to buy a HP DVD Drive to boot from (for system repairs, Linux, Windows, GParted) I asked the store assistant if ...
1
vote
0answers
224 views

How to boot OS X with network devices in promiscuous mode?

As OSX no longer allows ifconfig en0 promisc and sees that as a bad value and does not set the device flag, what other options are there? I'd like to be able to boot and have both my Airport/WiFi as ...
7
votes
2answers
20k views

Windows boot camp option missing in Startup Disk selection

I have a Mac Pro (early 2009) running Yosemite 10.10.2, all up to date. Yosemite is installed on my primary SSD (I have 2 additional magnetic drives). I use Boot Camp, and have Windows 8.1 installed ...
0
votes
0answers
1k views

My iMac hangs when I try to boot from a USB | EFI Boot

I have an iMac (iMac 8,1) and I am trying to install Windows on it. I used bootcamp to create all required parts and got to the part where it rebooted. I got the "No bootable USB devices" so I shut it ...
0
votes
0answers
723 views

Booting in safe mode or Repair if no keyboard synchronized

We have a Yosemite iMac that won't boot, it reboots in the middle of the loading bar with the Apple logo. Said iMac uses a Logitech bluetooth keyboard, and even if I press Shift or Cmd + R it won't ...
0
votes
1answer
282 views

No bootable disk when booting Windows after installing Linux on Mac

That must the weirdest title you've read in a long time. I have a MacBook Pro Mid 2012, I installed Windows 7 with Bootcamp and all was working fine. Last night I installed Kali Linux with a bootable ...
0
votes
1answer
261 views

Cannot initiate Windows 7 install on MacBook Air bootcamp

I use the latest Yosemite version on MacBook Air, I am trying to install Windows 7... I start bootcamp, I select the first two checkboxes [X] create windows 7 install disk [X] download support ...
0
votes
1answer
92 views

Macbook Pro (mid 2010) shutting down upon boot up

Here is my question. My macbook pro has been acting crazy for a while, shutting down unexpectedly daily. Every once in a while it will work for a day or two but eventually will start shutting down ...