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

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0
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0answers
38 views

Yosemite on rMBP 15" refuses to boot, fans running high

Everything was great. I hung out in OSX, did some work, then rebooted into Windows (Bootcamp) to play a game. After rebooting back to OSX, i notice that the system is stuck on boot. The apple logo ...
1
vote
2answers
326 views

Macbook gets stuck on Grey Screen, won't boot normally

I've tried many steps so I'll list them here, I can do a reinstall but I prefer to figure out the actual cause of the problem and I don't think a reinstall will solve it. Macbook 2007, OSX version 10....
0
votes
1answer
108 views

MacBook Pro 2011 keeps booting the OS X Utilities and won't accept our Apple ID

Before the issue became my headache, one of our relatives created a partition on my MBP to keep their files. Yesterday they deleted their partition and there might be important files that was delete ...
0
votes
1answer
139 views

How to edit Yosemite Bootloader, startup manager?

I have been searching and trying to correct my mid 2011 MacBook Air screen when you startup by holding the option key. My Bootcamp no longer shows but the created USB Windows 10 install stick does ...
0
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0answers
131 views

Winclone 5 partition is not bootable

I have been trying to transfer my windows copy from my old drive to my newer drive. I used WinClone5 to do this, but when I booted it up, it just said this: ðR(a smiley face)NTFS And a blinking ...
0
votes
0answers
219 views

Snow Leopard meets El Capitan: disaster?

My Machine: MacPro4,1, Quad-Core Intel Xeon 3,32 GHz, 32 GB RAM, NVIDIA GeForce GTX 680 video PCI, Sonnet USB3 PCI card I've been trying to install Snow Leopard in one of my empty internal drives ...
0
votes
1answer
405 views

Macbook pro stuck on boot - “AppleUSBHostPort::interruptOccurred: overcurrent detected”

I am trying to reinstall OSX on a MacBook Pro Mid-2009 but it hangs on startup. I have used several disks but now when running in verbose mode see that it hangs at "AppleUSBHostPort::...
5
votes
5answers
7k views

How can I get my 3rd party SSD to boot El Capitan?

I have a Mid 2012 13 inch MacBook Pro that's been running successfully with a hybrid drive (3rd party) for the last few years. Recently, the operating system crashed and the hard drive is no longer ...
2
votes
1answer
151 views

2011 MacBook Pro won't turn on

Although the problem is quite common, after googling for several hours I didn't find an appropriate solution for my particular case. I got a 2011 MacBook pro with the latest OS (El Capitan) and it ...
0
votes
1answer
67 views

Mac book Air Does not start without charger connected

When I close the lid of my macbook then it does not boot on opening the lid again. The battery is 100% charged, It boots only when I connect the charger and takes 3-4 minutes charge before it starts ...
0
votes
3answers
4k views

OSX El Capitan - cannot make bootable usb stick with boot camp

I meticulously followed this tutorial, and this worked for me in 2014. I have a 4GB usb stick plugged into the computer. It should be enough for windows 7, a partition which no longer boots and I am ...
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 ...
1
vote
1answer
875 views

Create bootable USB disk with Bootcamp 6

I have OS X El Capitan with Bootcamp 6 in an Early 2015 Retina Macbook Pro. I want to create a bootable USB disk with Windows 10 to install it and then completely remove OS X. I have read different ...
2
votes
2answers
186 views

Cloning Macbook Pro HD to external HD and still using it

I am still on Mavericks and want to upgrade OS X, but since I use a lot of audio apps, plugins etc that would break - I am looking for a way to clone my entire Macbook Pro 1TB SSD as it is right now ...
3
votes
5answers
15k views

How to properly install Kali Linux on MacBook Air (dual-boot with El Capitan)

I updated to El Capitan yesterday (on MacBook Air 2014). I then decided to install Kali Linux 2.0, and boy it's been one problem after another, so far nothing has gone the way it's supposed to. ...
1
vote
1answer
342 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 ...
0
votes
0answers
37 views

Disable boot volume

I would like to know how to stop a volume from being bootable. I've recently installed an SSD into an iMac by replacing the DVD drive with an SSD. The original hard drive is still in the iMac and is ...
0
votes
2answers
206 views

Is it possible to run Android on iOS?

Ok so I was thinking, Can you run Android on a iOS device? I did some research and Android could run on ARM (Most apps would not work) but how come no one has tried to run it. Whats holding them back?
0
votes
2answers
493 views

Boot from USB in macbook pro mid 2012

I have removed everything from my macbook pro. Now, how can choose USB as a startup disk? I tried using option "SHIFT" keys also cmd+R. Nothing is working. How can I solve it? I am using Mid 2012 ...
0
votes
1answer
119 views

MacBook Pro won't boot

I have a Macbook Pro 8.2, Intel i7, 4 GB of RAM and 500 GB HDD. While working with some apps open in background, the screen suddenly went blank and music looped. In panic I pushed the power button to ...
1
vote
0answers
26 views

Is the boot menu (ALT on boot) black now?

I have a new MacBook Pro (mid 2015). When I boot, I saw that now the apple is white on a black background. Okay maybe Apple has updated this design. However, I find very odd the boot menu (the one ...
0
votes
0answers
395 views

MacBook Pro: panic cpu caller kernel trap

I am using MacBook Pro with OS X Yosemite installed. Lately my system is crashing and not booting up. While system was crashing, the screen was flickering and then it got shut down. I tried to ...
1
vote
1answer
244 views

iMac 2008 Core 2 Duo does not list my bootable USB stick in the boot menu?

Hi i am trying to install OS X El Capitan on iMac 2008 model Core 2 Duo processor, and 4GB Ram. The way i followed is i created a USB bootable stick and insert to mac machine and restarted the ...
0
votes
0answers
58 views

Diagnosing why a mac needs safe mode to boot

"Fresh" install of snow leopard 10.6 needs safe mode to boot. It's a 2006 24" iMac and I can't upgrade the software to lion since it's not availiable on app store (I don't really want to shell out any ...
1
vote
0answers
272 views

10.11 Prohibitory Symbol after Reimage or Kernel Panic on NetBoot

I apologize if this is convoluted. I've tried so many different ways of getting this to work that I'm getting them all mixed up. With the launch of Mac OS 10.11 El Capitan, we've encountered some ...
0
votes
0answers
236 views

Lion, Yosemite, El Capitan, or Ubuntu 14LTS - Create a BOOTABLE USB - 2006 MacPro 1,1

My box is a 2006 MacPro 1,1 - notable for it's 32b efi mixed with 64b Xeon processors. I can boot into all the OS's listed above. I have tried every method I can find to create a Bootable USB key. ...
0
votes
2answers
145 views

I deleted my OSX partition, and have no patitions formatted to bootcamp, so I can only access BIOS

I recently created a windows 7 partition on my mid-2009 mac-book pro. It then corrupted, so I was forced to delete the partition and attempt to reinstall windows 7, but in the process I also deleted ...
0
votes
0answers
60 views

Bootcamp no longer able to boot to OS X

I have a Macbook Pro 2014 with a Boot Camp partition for Windows 10. I decided to create a partition for data. I created and re-sized the partition in Disk Utility (OS X) but formatted it using a ...
0
votes
1answer
706 views

My MacBook Pro makes 3 successive tones, a 5 second pause (repeating)

My MacBook Pro makes 3 successive tones, a 5 second pause (repeating). According to Apple, this indicates RAM does not pass a data integrity check. So how can I fix it?
0
votes
0answers
3k views

Windows 10 partition no longer boots after El Capitan upgrade

I have a triple boot MacBook Pro (mid-2014 model) with separate partitions for Mac OS X, Ubuntu Linux, and Windows 10 (recently upgraded, without any issues, from Windows 8.1). Before, everything ...
0
votes
1answer
349 views

Mac book Pro [2011 model] - Screen bit distorted and greenish tint and does not boot completely after the apple logo and progress bar loads

My Macbook Pro hung so I forced restarted it but on restart the screen was bit distorted and had greenish tint (Picture below) also it never goes past the Apple logo and progress bar to boot ...
1
vote
1answer
20 views

Fans in overdrive but fails to boot

I have an Apple Xserve Intel Xserve3,1 with dual quad core cpu and 48gb ram. Today the system fans started going into hyperdrive (i.e. very fast and very high pitched) and was unresponsive to ...
1
vote
0answers
57 views

Lost a Fusion drive boot disk

i can see my Fusion Drive disks (ssd+hdd) in Terminal: But i lost it in the boot and cant boot MAC OS. (please see album with photos on http://imgur.com/a/N5zY2 ) I cant repair my system, when i ...
1
vote
0answers
94 views

Trying to run Windows from USB on Mac, says “No bootable device found”

I am trying to run Windows 10 on my Macbook Air. I originally wanted to upgrade my SSD so that I would have enough space for a windows partition. Unfortunately, I can't do that with my model (I have a ...
1
vote
0answers
32 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
58 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
vote
2answers
6k 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 ...
8
votes
4answers
32k 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
vote
1answer
924 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
127 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 ...
0
votes
2answers
100 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
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 ...
0
votes
0answers
185 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 /Library/Extensions/...
0
votes
0answers
474 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
34 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. ...
0
votes
0answers
66 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 10.10....
1
vote
2answers
2k 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
671 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
313 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
votes
1answer
464 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 ...