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
2answers
4k 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
1answer
534 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 ...
0
votes
0answers
99 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 ...
1
vote
1answer
899 views

Accidently deleted some small sized partitions when installing WIndows(Bootcamp). OSX Partition wont boot

I tried to install Windows 8 into my Mac via Bootcamp. I booted into the Windows 8 Installer and had issues formatting the drive that I partitioned for the OS. Like an idiot, I deleted all of the ...
0
votes
0answers
72 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 ...
0
votes
0answers
240 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
votes
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. ...
12
votes
5answers
48k views

How do I make a bootable USB flash drive a Mac?

Does anyone have a Terminal command-line recipe for making a new bootable USB flash drive for one of the new MacBook Air's? Is there a way to dd copy the USB boot device that comes in the box and ...
0
votes
0answers
216 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
289 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
votes
0answers
57 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
vote
2answers
487 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 ...
1
vote
1answer
1k views

Interpreting Mac logs: was this computer booted up normally?

**UPDATE: Log shows a normal boot up to login screen. Was confused because I was comparing it to a log of a firevault protected computer BOOT LOGS SHOWN BELOW: Mar 29 15:41:55 localhost bootlog[0]: ...
0
votes
1answer
310 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
101 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
3answers
13k views

Macbook Pro won't boot into OSX (circle with line through it), but Windows works fine

When I try to boot into OSX, after 30 seconds or so the Apple symbol is replaced by a circle with a line through it. If I try single user mode, it stops at a certain point before booting entirely and ...
0
votes
0answers
130 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 ...
4
votes
1answer
997 views

Macbook doesn't display on external screen until after I log in (Yosemite). How to fix?

I have a macbook pro (mid-2011) and an HP Pavilion 22bw (prob inconsequential) connected via a Thunderbolt DVI Adapter. Ever since installing Yosemite, I now need to open the macbook pro and log in ...
0
votes
0answers
120 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
38 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. ...
2
votes
2answers
293 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, ...
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
2answers
555 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 ...
17
votes
4answers
236k views

Create a Bootable Windows USB from a OS X to work on a PC

What I need to archive is Create a Bootable usb drive from Windows 7 iso image using a Mac running. Use the flash drive to boot and install windows on a PC (not Mac) What I'm looking for is an app ...
0
votes
0answers
17 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 ...
2
votes
2answers
1k views

Failed startup after 10.10. upgrade

After upgrading to 10.10.4 from 10.10.2, my Macbook Pro (late 2013) boots up to a blank screen with the mouse cursor displayed briefly every 10 seconds. Booting to safe mode and resetting the SMC or ...
1
vote
4answers
7k views

Replacing “apple hardware test” with “apple diagnostics”

According to this article, holding down the "D" key while my MacBookPro11,3 boots should bring up "Apple Diagnostics". However, "Apple Hardware Test" comes up instead. When I try to run in, it ...
0
votes
1answer
1k views

Preventing booting from external media

Is it possible to set up Mac OS X 10.8 (Mountain Lion) on a MacBook Air so that users cannot boot from external media (e.g. a USB memory stick) and cannot restore the OS from the internal restore ...
0
votes
1answer
26 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?
2
votes
2answers
2k 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
54 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
495 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
100 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
80 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
115 views

MacBook Internet Recovery “?” Folder

With my 2012 MacBook Pro, I'm trying to reinstall Mac OS X (any version that will work) onto a new Solid State Drive that replaced a broken one. I can get to the Internet Recovery screen just fine ...
2
votes
2answers
147 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 ...
0
votes
2answers
920 views

How do I repartition my Mac to get rid of my dual boot setup?

I setup dual boot on my Mac (with Ubuntu) and want to get rid of it. The Disk Util GUI shows me: However attempting to remove the disk0s4 or disk0s5 partitions results in: Could not unmount ...
0
votes
0answers
106 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
79 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
25 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
1k 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
179 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
385 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 ...
20
votes
5answers
107k views

How to install OS X Mavericks in VirtualBox?

I have been trying to use Hackboot to install OSX Mavericks in VirtualBox, and using an ISO image created by following the steps at How to create bootable ISO for OS X Mavericks The steps I have ...
1
vote
1answer
198 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
vote
0answers
181 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
votes
2answers
2k 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
38 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
2answers
7k views

Can I use 16 GB RAM with my MacBook Pro 7,1?

I just picked up 16GB of RAM for my MacBook Pro, running the newest OS X. According to the NewEgg reviews, it should work in it. However, once I boot up, it shows the Apple logo and, after a few ...
1
vote
2answers
717 views

MacBook will read USB drives with no problem, but will not see the USB drive as boot drive

I am trying to install OS X Lion on a Macbook 4,1 which I've upgraded to 4 GB of RAM. It should support this OS, however I cannot get my Mac to see the USB drive as a bootable option. It's a SANDISK ...