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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1answer
56 views

Macbook Pro 15 progression bar halts then circle spins

We have a Macbook Pro 15 Last 2011. The computer starts to boot, it shows the progression bar, then it disappears and the circle just spins. I have tried safe mode and it just spins. I just ran ...
1
vote
0answers
79 views

How to make a bootable (encrypted) copy in an external drive from a FileVault 2 encrypted boot partition

I configured my MacbookPro (Retina) as follows: /dev/disk0 (GUID partition scheme) EFI 200 MiB Apple CoreStorage 128 GiB <- FileVault 2 encrypted Apple Boot 650 MiB <- ...
0
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0answers
17 views

Create Mavericks bootable USB under Windows for MacBook Air [duplicate]

After experiments with my macbook air, I have clean hdd drive without any OS on it completely (nor recovery partitions). How can I create bootable usb flash drive to install mavericks back to my ...
0
votes
0answers
348 views

Mac alternative boot loader for booting legacy OS from USB

I am trying to install Windows 7 on my MacBook as a dual boot setup. I have a MacBook 7,1 running Mavericks. I have replaced the DVD drive with a SSD (now have 2 internal drives) so cannot use a ...
-1
votes
1answer
97 views

How can i recreate my Partition Table

What happened: While i was tinkering around with my bootcamp partition something went terribly wrong. end of story is, i have no partitions left in my partition table The current situation: i can ...
0
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0answers
51 views

Used DiskMaker to create bootable USB, got error 10600, USB won't mount

I tried creating a bootable USB for Mavericks. Downloaded and used DiskMaker X. Got an error, -10660, and the app closed. Now my Mac won't mount (or recognize) the USB drive. It doesn't show up in ...
1
vote
1answer
386 views

Mac wont boot and fan runs high

My Mid 2013 macbook pro recently will no longer boot. I was using it normally (no excessive use) and then all of a sudden it just went black and shut off immediately. I can no longer boot it (I got it ...
1
vote
2answers
105 views

Boot on USB from a previous version of OSX

I own a mid-2013 Macbook Air running Mavericks and wish to boot on a USB stick containing a bootable version of DiskWarrior. The problem is DiskWarrior wasn't updated for quite some time and, though ...
0
votes
1answer
7k views

How do I create a Mac bootable USB drive using Windows?

My MBA 2012 with OS X 10.9.4 Mavericks won't boot anymore - it simply freezes after the initial jingle. I already tried resetting NVRAM and SMC, but to no avail. I don't have any time machine backups. ...
-1
votes
1answer
38 views

Boot off of USB drive problem - new iMac

how can i boot off of usb disk to install snow leopard onto new iMac that has mavericks installed
0
votes
1answer
66 views

Why doesn't my MacBook recognize the original HD any longer?

I replaced the stock hd with a samsung ssd (840) about 18 months ago. It died last week. I tried putting the original HD back in and the computer won't recognize it. Even when I hold down the option ...
0
votes
1answer
59 views

My mac would not boot so I formatted the drive and now it has no OS

So there is a whole other backstory as to why my computer would not boot and why I needed to format the drive. The only thing I need to know is how can I install an OS to my computer. I tried CMD-R, ...
3
votes
0answers
117 views

Modify SATA link speed down (Mac won’t boot)

I have a MacBook Pro (Early 2011, MacBookPro8,2) which I cannot reboot, otherwise I have to reinstall Mavericks every time. Sleep mode works, luckily, but sometimes I need to reboot. In April my HDD ...
0
votes
1answer
42 views

Mac pro 2,1 boots up but won't restart?

I am very confused with this problem. So I just recently purchased a 8 core 3.0ghz Mac Pro 2,1 and I upgraded the memory with 16gbs of hynix ram, and everything worked great the computer was reading ...
0
votes
1answer
580 views

How to exit Recovery Mode on jailbroken iPhone

What I've searched so far says that my iPhone had goes to Recovery-Mode (Am I right?) because it stuck on Apple Logo and won't start. What I've tried so far : What is Soft DFU mode, and how do I ...
1
vote
1answer
3k 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 ...
0
votes
1answer
133 views

Macbook won't boot

I have a Macbook pro 13" that won't boot up. I searched for solutions online and the issue seemed battery related to me. I opened the back panel of my Mac and took out the RAM and placed it back. ...
0
votes
1answer
60 views

Mac mini won´t boot up

I have a Mac mini that fell from a desk, my kid was playing aroung and it hit the floor, I picked it up and it stared up but when the Apple logo comes up the little cricle appears and thats it, it ...
1
vote
1answer
505 views

Macbook Air intermittently can't find startup disk

About six months ago, my Macbook Air started having a strange issue where it would often not be able to find the startup disk, giving me the flashing question mark. Initially, I was convinced the hard ...
3
votes
1answer
59 views

Possible reasons (other than Open Firmware Password Protection) for not being able to boot into single user mode?

Recently I was attempting to install some new software for a user. I followed these instructions to create a new admin-level account but when I held down cmd+S while booting it still booted into the ...
0
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0answers
24 views

Bootup error on every boot method, HD, Recovery drive, External HD system and USB?

Bootup error on every boot method, HD, Recovery drive, External HD system and USB??? I get the following error on but, white screen apple logo, then error and keeps restarting and starting cycle ...
1
vote
3answers
210 views

Disk became full, had to force shutdown, now it doesn't boot

Don't know why I didn't get a warning about disk being almost full... It came down to zero free space and I couldn't do anything except force-shutdown it. I booted into Windows, deleted some files ...
2
votes
0answers
237 views

How to bless a partition using a custom EFI-boot file with non-conforming directory structures and/or file names?

Is there a guide on how to bless a partition for booting, one that doesn't have the default /System/Library/CoreServices/boot.efi structure? For example, I installed GRUB on the default EFI System ...
2
votes
1answer
720 views

Macbook boots up to grey 'prohibited' symbol

I'm having an issue with my '09 13" Macbook Pro. When I boot it up, it seems to be booting normally until about thirty seconds in, when the Apple symbol is replaced with a kind of 'no-smoking' symbol, ...
1
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0answers
335 views

Windows 7 on Macbook Air 1,1 *without* Boot Camp

I'm trying to install Windows 7 on an early 2008 (1,1) Apple Macbook air, on which OS X is not present. The machine is not able to boot directly the win 7 iso, supposedly because it lacks some support ...
1
vote
1answer
99 views

Boot menu not working

So basically I can't boot from my ssd anymore. It just shows a grey screen with an error symbol. I can't get into target disk mode and none of the other boot shortcuts seem to be working either. When ...
0
votes
0answers
106 views

After strange startup issues TimeMachine/Migration not working properly, some data seems to be lost

since I couldn't find a solution for this problem I hope somebody of you may have one: When I was in holiday 2 weeks ago and repeatedly tried to boot my MacBook Pro 15" (2012, DIY Fusion, FileVault 2 ...
0
votes
1answer
65 views

If I mess up the EFI System Partition, will Mac OS X be unbootable?

I forgot to make a backup of my EFI System Partition (ESP) and have installed grub onto it. If I happen to accidentally mess up the partition, will OS X be bootable? If not, how would I restore the ...
0
votes
2answers
6k views

No bootable device found ( Install windows on Mac )

I'm owning a macbook pro 13 inch mid 2009 and a USB thumb drive Kingston DataTraveler 100G3 16 GB. I successfully installed Windows 7 on my Mac using Bootcamp ( with a little trick to enable "Creat a ...
2
votes
0answers
131 views

Startup Screen Flashes Pink

During boot, I see the gray screen with the Apple logo, then the entire screen flashes pink for a couple seconds before boot continues normally. Is this a problem/symptom of something? MacBook Pro ...
0
votes
0answers
17 views

Installing Mac OS 10.6 on PC [duplicate]

I need to install Mac OS 10.6 on my laptop using Windows. So I have an .ISO file with Snow Leopard and USB drive,i try to create bootable USB drive via PowerISO but later,when i try to boot from USB ...
0
votes
1answer
319 views

MacBook Pro doesnt boot after systemupdate / repairing volume doesnt work

i have a problem with my MacBook Pro. I installed a Systemupdate, reboot and then i had a loading screen which loads a long time. Then i started the mac in verbose mode and there is... hfs: mounted ...
1
vote
1answer
76 views

Force a read-only mount of startup disk

I want to create a MacOS recovery startup disk on a USB flash drive. In order to maintain the integrity of the drive's contents (and, perhaps more importantly, reduce write wear on the flash drive ...
1
vote
1answer
76 views

Boot straight to an Application when Mac is turned on

I have a client who wants to use Mac OS X and a Mac Mini to sell a software solution to end users that ALWAYS boots straight to an application when the Mac is turned on. They can't access the login ...
2
votes
1answer
107 views

Changed the mod for ~/.. directory by mistake, made it 744, can't boot anymore

I ran the following command by mistake: sudo chmod 744 ~/.. and I can't boot my macbook anymore, it freezes with the brown screen and ajax-style spin. What should I do to make it work normally ...
2
votes
1answer
5k views

No bootable device - insert boot disk and press any key

When I boot my Macbook Pro 13" Retina (running newest Mavericks), it is showing me this error: However! If I boot holding the ⌥ alt-key, it shows Mavericks as option. When I press ⌤ enter-key to ...
0
votes
1answer
934 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
0answers
360 views

After upgrade Lion to Mavericks, can't run Windows 7 on boot camp because is hidden/disabled

The question is about iMac (21.5-inch, Mid 2011) It was with Lion, there was a Windows 7 (32bit) partition created by Boot Camp v4. So, I made the upgrade to Mavericks (no clean install), after this ...
0
votes
1answer
68 views

Debian won't book on MacBook Pro

I erased the entire content of my MacBook Pro when installing debian. Now, the laptop will not boot into Linux. When I insert USB again it will start installation again. I even selected bootable ...
1
vote
1answer
967 views

Dual boot Ubuntu 14.04 on a MacBook Pro

so after a few hours of Google searching and too many headaches with a broken GPT, I've turned here. I have a 2012 MacBook Pro (9,2) that I want to dualboot OS X 10.9 and Ubuntu 14.04 on. I've read ...
1
vote
2answers
8k views

Dual booting Yosemite/Mavericks: Stuck in Yosemite with an 'Install OS X' volume instead [closed]

I've made a partition on my hard drive, so I currently have Macintosh HD (call it 1) and Macintosh HD 2 (call it 2). I downloaded the Yosemite installer with my Mavericks install on 1, then ran it ...
2
votes
0answers
54k views

Freeze on boot after installing Yosemite

Sorry for the writing style but I am typing from my smartphone now. My MacBook pro on Mavericks worked like a charm but crazy as I am I decided to install Yosemite without any backup as I am lacking ...
0
votes
0answers
12 views

How to boot in Windows by default? [duplicate]

I installed windows 8 on a bootcamp partition. When the computers shut off because the battery is low or because of windows update, it will restart in Maverik (unless I notice in time to press alt ...
1
vote
1answer
454 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
1answer
783 views

nvram boot-args to boot in target disk mode

I'd like a Mac to always boot in target disk mode. Similarly to setting sudo nvram boot-args="-v" which boots in verbose mode, I tried sudo nvram boot-args="-t" but to no avail. Any idea?
0
votes
0answers
106 views

2 Mac Mini Server in a restored RAID 1 config and question mark folder at boot

We have two identical Mac Mini servers (let's call them A and B) running OS X Lion with two 500 Gb HD. Using a Thunderbolt cable, a RAID 1 matrix was creating using three HDs (2 from A, 1 from B) with ...
3
votes
1answer
352 views

iMac will not boot

An office iMac will not boot - it sits at the gray startup screen with the progress circle spinning continuously. I have tried: Booting in safe mode (same result) Booting in recovery mode (same ...
0
votes
0answers
28 views

Ubuntu boot not available at startup

I have partitioned my internal hard drive and installed Mac OS X Mountain Lion on one partition and Ubuntu 14.04 Trusty Tahr on the other. The installation was done via alt/option key at startup ... ...
6
votes
1answer
6k views

Stuck in a boot loop after failed update to Mavericks, can't reformat HDD

I recently tried to upgrade a 2008 Mac Pro from Snow Leopard (10.6.8) to Mavericks (10.9.2) using the free upgrade available in the App Store. The upgrade seemed to go without a hitch until the ...
2
votes
1answer
594 views

Install Windows on MacBook Pro, without OS X

I installed Linux Mint on my 2006 MBP 15" this weekend before hearing that the system will not enter a compatible firmware mode for Linux/Windows without rEFIt or rEFInd installed first. Well, I do ...