Questions tagged [boot]

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

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Macbook Pro can only startup with external hard drive connected [duplicate]

Here are the facts: 13 inch, mid 2012 It gave me the grey screen with the flashing question mark folder one day, and I got an external hard to install the MAC OS X operating system like the apple ...
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182 views

Launch daemon does not run at boot, but will run when loaded by hand

I have a launchd daemon definition /Library/LaunchDaemons/homebrew.mxcl.docker-machine.plist which contains: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD ...
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need help I screwed my macbook so bad thiere is one drive and no partitions, please read below [duplicate]

So...I somehow messed up my macbook Pro model 1502 raetina 13" Late 2013, core i5, 4GB. I wanted to clean install High Sierra. Long story short I now have a macbook with one, yes one, there is no ...
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unexpected reboot then unable to boot

Model Name: MacBook Pro Model Identifier: MacBookPro10,1 Processor Name: Intel Core i7 Processor Speed: 2.3 GHz Number of Processors: 1 Total Number of Cores: 4 L2 Cache (per ...
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Which NetBoot Server Am I Booted From?

Is there a way I can tell which NetBoot server a client machine has booted off of, from within the client machine itself? This is kind of an obscure question, but I am in an environment that has two ...
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493 views

Missing Operating System

So I recently made a post about my Mac not recognizing USB's or Boot. here's the link : MacBook Wont Boot or Recognize USB. Anyway this is an update. So my 2009 MacBook is still not working. It doesnt ...
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737 views

Mac Book 12" (early 2016) kernel panic IONVMeController.cpp:4949

My Problem: Mac Book 12" (early 2016) in use for 1 year without any problem suddenly stopped while working and now cannot be started again / shows this panic report on startup: panic(cpu0 caller ...
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1k views

What does “AMFI: code signature verification failed” mean during single-user boot, and should I worry?

I had to boot into single-user mode for something and during the boot process I noticed repeated error messages, "AMFI: code signature verification failed". What could be causing these, and is this ...
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427 views

Change boot device on Mac OS X 10.10 to an AFP partition

My Mac Pro ran with Mac OS X 10.10 until last week. I split the disk into two partitions, mirrored the OS and updated it on one partition to macOS 10.13. After the update I changed the startup disk ...
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51 views

Set the mode for next boot from the terminal

I'd like to be able to boot into the recovery mode the next time the machine boots not by using the start up key presses. I'm already logged in in normal user mode - can I set this in the terminal? ...
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1k views

iMac 2008 Flashing Question Mark on Startup (Tried almost everything)

I recently purchased an iMac from a local Goodwill. After talking to Apple support I was able to find out that this is a 2008 all-in-one model. Additionally, I asked for help with the "flashing ...
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793 views

Repair MacBook Air Prohibitory Symbol

I got a friends MacBook Air that isn't working after an update. When I boot, I see the Prohibitory Symbol. I tried to boot in safe mode, did a NVRAM and SMC reset and Apple's First Aid on the SSD. I ...
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304 views

Windows 7 only boots to Windows boot manager with Continue Recovery not going anywhere

Windows 7 Boot Camp doesn't boot on MacBook Air 2011. The only option I get in Windows boot manager is "Continue Recovery", If I press "Continue Recovery", I get a black screen with flashing cursor. ...
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2k views

Macbook Pro screen keeps randomly going black after login, weird issues

A couple days ago while I was using my 15 inch Macbook Pro 2015 Retina Display laptop (got it brand new 2-3 months ago, running latest version of Sierra), the screen flashed black a few times, and ...
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How to support 32-bit windows installation on boot camp

I'm attempting to make my USB a bootable windows 7 installation. I have the Windows 7 installation ISO image and related files. When I attempt to format my USB with the files, I receive the error: ...
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253 views

My MacOS Sierra won’t load up stuck at boot

Yesterday night while working my MacBook got stuck since it was too late instead of waiting for it to restore to normal I forced shutdown today morning I got up and MacBook with Mac OS Sierra ...
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306 views

Deleted MacOS partitions and installed Ubuntu, now can't boot with DVD, USB or internet recovery to reinstall MacOS

I deleted all partitions on the MacBook's HD and installed Ubuntu. Now I want to reinstall MacOS but nothing will work. Holding option on startup shows the grey screen with the pointer but no ...
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60 views

MacBook wont boot after creating two small partitions

I recently created 2 small partitions, and after that, I shutdown my Mac. Then when I turned Mac back on today it took awhile to boot and then showed a blocked symbol. I tried booting into the ...
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661 views

Ubuntu dualboot alongside OS Sierra — “This computer currently has no detected operating system installed”

I am trying to install dual-boot Ubuntu 16.04 alongside OS Sierra. What I have done so far: Installed rEFInd. Partitioned a 25G Mac OS Extended (Journaled) using Disk Utility. Made a bootable USB ...
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13k views

Making a Bootable Windows 7 USB without Bootcamp

I recently got a macbook pro with the intention of dual booting Windows 7 so that I can play some old games I still have that don't run on anything more recent, and generally access my Steam library. ...
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111 views

Mac Won't Enter Firmware Restoration Mode

I'm trying to solve a real head-scratcher of an issue on an older iMac (model 6,1, a 2006 24" white model) and want to eliminate the firmware as a possible culprit. To that end, I've created a ...
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8k views

When I turn on my MacBook Pro, I see the Apple logo and the progress bar but then it turns off

When I switch on my MacBook Pro 2011, I see the Apple logo with progress bar but before it enters the next screen it turns off. Why?
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605 views

How to force the opening of UNetBootin? [duplicate]

I'm trying to install UNetBootin for a MacBook Pro (13-inch, Mid 2012). However, I got this message when I tried to open it. Could anyone be able to tell me what I can do to force its opening?
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154 views

Resetting OSX's hardware related settings after booting the system on a newer Mac model

I have copied the complete internal disk (using Disk Utility) from a 2008 MacBook Pro, running 10.11.6, to a Late 2013 MacBook Pro (I wanted to avoid using the Migration Assistant because that leads ...
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136 views

Macbook Pro powers on but won't boot. What to do?

There are about a dozen questions similar, but all of them get further along in the startup than I do. Purchased a used MacBook Pro 2012 (December 2011). Seller (whom I trust) said that it wouldn't ...
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1k views

Installing El-Capitan on Macbook Air 2008 running 10.5.8

I have a MacBook Air 2008 running 10.5.8, and I need to install 10.11 on it instead. Since there is no app-store, one of the ways is to find an install CD of 10.6, and then install El-Capitan. I ...
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52 views

What programs are run when in safe mode and waking up from sleep?

I have been having some terrible issues with my MacBook Pro Retina in that it randomly shuts down within 5 minutes of booting up. I seem to have isolated a problem free environment to safe mode ...
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1answer
748 views

Windows 10 No Boot Device

I made a bootable Windows 10 flash drive using Bootcamp on my MacBook. When bootcamp is finished with everything it restarts my computer like normal. But when it restarts so I can install Windows, it ...
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1answer
1k views

MacBook Pro will not boot, begins to load then hangs with white screen [duplicate]

I am unable to get my MacBook Pro to boot. It turns on, and the Apple logo + loading bar appear however after a minute or so of loading it eventually changes to a white/grey screen and just hangs. ...
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1answer
62 views

How can I safely create a partition to an already bootable drive

I already asked this question on Apple's community forum, right here, so I'll post the answer here if something comes up there first. This is my problem : I recently bought an external drive of ...
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1answer
278 views

How to Rescue OS X without Visible Startup Disc?

I need to delete refind but I cannot do it because I bypass it, since I cannot see visible startup disc. I stopped partition process where I tried to erase Linux partition because of infinite time in ...
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1answer
623 views

macbook pro encounters prohibited sign while booting with USB

My macbookpro is completely empty and the only option that I have is just internet recovery. I downloaded el capitan and with help of the terminal in the internet recovery build a bootable OSX el ...
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1answer
654 views

Booting gets stuck for a minute when using Bootcamp on Windows 10

I installed Windows 10 using the official ISO and one of the serials I have with MSDN. When I reboot my Macbook Air 2013 it gets stuck on a black screen for around a minute and then start loading ...
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146 views

My iMac Doesn't boot it. Hangs with spinner and verbose mode can't boot

I have my iMac and I have to install Yosemite because I got iMac with older version when I got it. Then I did too many updates but I had my iTunes account and I had my credit card option set to "None" ...
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1answer
482 views

SNB Framebuffer did not show up,unload - MBP won't boot

I recently got a new MBP. My older MBP (early 2011, 13") has some stuff on it I would like to transfer. I tried using migration assistant, but it appears that they need the same OS versions. I tried ...
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2answers
5k views

Connecting external display turns MacBook screen black

For years, connecting to external monitors on my MBP 9,2 (10.10.4) worked just fine (except the occasional crash). Until yesterday, where I had three crashes in quick succession. Now when the display (...
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1answer
39 views

Don't want my hard drive to die again!

A couple of months ago, my Mac Book Pro wouldn't start up - it would make it halfway through and then power down. I took it to the repair store, and they said the hard drive was broken, and they ...
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79 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 ...
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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 ...
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214 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 ...
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247 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
82 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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234 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 ...
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173 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 ...
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81 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 ...
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746 views

Is it possible to tell if a Macbook hard drive was booted internally versus externally (usb, firewire, etc.)?

Is it possible to tell from system.log or other logs whether a macbook pro hard drive was booted internally or taken out and booted externally (from USB, for example) ? I'm thinking the "BSD root" or "...
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88 views

Is there any way to reattach an 'orphaned' Windows installation?

I have a Windows installation in a partition on my hard drive. The problem is, it's not showing up when I startup holding alt. I installed Windows through VirtualBox, linked to a physical partition ...
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36 views

Can't boot after graphic error

Specs: MBP 15-in late 2011 running Yosemite 10.10.3 Background I have an external monitor that I've been using for about a year, but recently the Thunderbolt-to-HDMI adapter I have has been giving ...
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1answer
825 views

Stop sign when booting from internal ssd, boot goes fine if the ssd is in external case

sorry for the long post and my english. I have an early 2011 Macbook Pro 13 which I purchased in july 2011 and it worked fine until one week ago. Since when I bought it i replaced the stock hdd with ...
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232 views

OSX Yosemite won't show desktop

So I got some freeze issue and beach ball indicator was appeared for me. So I was watching rotation of it during ten minutes and then hard reset my mac. So did because I can't click any buttons or ...