Questions tagged [boot]

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

232 questions with no upvoted or accepted answers
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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 ...
7
votes
1answer
2k views

Is there any way to prevent a MacBook Air (2018) from powering up when the lid is open or an input device (keyboard or trackpad) is touched?

So, I am a happy (genuinely, not sarcastic!) owner of a new MacBook Air (2018). It works great! It’s running macOS 10.14.1 (Mojave). But it seems to do something that owners of 2016 to 2018 MacBook ...
4
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0answers
89 views

Deleting a linux dual boot on mac

I have a linux dual boot installed with rEFInd, which I want to delete. I tried to just delete the disk partition, but that throws an error. MediaKit reports partition (map) too small. If you ...
4
votes
0answers
3k views

What is IOConsoleusers: gIOScreenLockState error during boot?

So yesterday morning I was using my Mac normally encoding some videos in HandBrake and installing some github repo installing some python packages system wide like a python package named b45. Then I ...
4
votes
0answers
2k views

Whats wrong if 'Invalid BS_jmpBoot in boot block: 000000'

I have a corrupted partition and upon trying to repair it with disk utility it gives the error Invalid BS_jmpBoot in boot block: 000000 Several postings on the internet describe this problem related ...
4
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0answers
76 views

Is my system disk damaged?

Recently I couldn't get my Mac (bought in April - 2009) to boot. The hard disk was quite full and honestly speaking I kept ignoring a number of warnings from OS X to 'free up some space'. I have been ...
4
votes
0answers
4k views

Creating a bootable Windows USB drive when Bootcamp is already installed

I just upgraded to El Capitan, and am now having issues booting directly into Windows. I need a bootable Windows USB stick to repair my bootcamp partition, but I'm having a difficult time making that ...
4
votes
0answers
670 views

How to 'startx' from Single User Mode?

I usually run dwm inside Xquartz on OS X Mountain Lion 10.8. But is there a way to boot into Safe Mode (or a console), then startx or xinit, skipping Aqua? I'd like to boot directly into X11.
3
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0answers
52 views

Dual boot bootloader problems - Mac & Linux

I recently stumbled upon a problem with default MacOS bootloader. The scenario is next: My Macbook pro 2012 only has one 256 GB drive from where I specified 70 GB's of space to be used as Ext4 ...
3
votes
0answers
2k views

Need an external Linux with hardware driver and support for MacBook Pro 2016 or newer

What Linux support hardware drivers for screen / trackpad and optionally all keys? Core requirements: no state changes to the original hard disk (this qualifies it as "external" ) drivers for Apple ...
3
votes
0answers
331 views

After trying to install Kali Linux I can't access macOS anymore

I've tried to install Kali Linux as dual boot with macOS. I've partitioned 20 GB on the side from 250 GB for that purpose but the installation didn't go as planned. So I decided to reboot macOS and ...
3
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0answers
32 views

Users on boot screen don't refresh

I'm running macOS 10.13 on a MacBook. Users & Groups show me one Current User and a deactivated Guest User: but on the boot screen another user shows up, that I had added and removed a few weeks ...
3
votes
0answers
588 views

Unable to restore iMac

I am somehow unable to restore my iMac from 2011. Someone gifted me the iMac but had his HDD removed. I thus reinstalled a new HDD. After the chime I press Option+Command+R and the network restore ...
3
votes
0answers
428 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 <- ...
3
votes
0answers
2k 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 ...
3
votes
0answers
62k 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 ...
3
votes
0answers
4k views

MacBook does not list my bootable USB stick in the boot menu

I made a bootable USB stick with OSX Lion. When starting up my Mac Mini (which has OSX Mountain Lion installed) while holding option, the USB stick is listed and I can boot from it. But I want to use ...
3
votes
0answers
664 views

Disable boot from CD/DVD

Is there a way to disable the boot from CD/DVD? I don't want to disable it permanently, just when it automatically checks on boot for the presence of a CD/DVD.
2
votes
0answers
16 views

Recovery Mode can't see new drive but USB installer can

I'm having a lot of difficulty replacing a dead SSD in a 2013 macbook pro. Before the drive died the computer was running a fairly old version of OS X, seemingly Yosemite. I bought an OEM ...
2
votes
0answers
26 views

How to access ASL (Apple System Log) from macOS Recovery?

I have trouble booting the MacOS system. It's in constant loop. I don't know how can I access the logs from MacOS Recovery so I can troubleshoot it. Any suggestion? Can I do SSH to the system?
2
votes
0answers
58 views

Replaced SSD won't boot

I have cloned the HDD from an old MBP (Early 2011) to a Kingston A400 SSD. When booting from USB it all works fine, however once installed internally when booting it shows a no entry sign 🚫 (I assume ...
2
votes
0answers
21 views

Booting into macOS installer; possibly stuck

I'm trying to boot into a macOS Sierra installer that I made today. For the last about 20% of the progress bar, it was booting extremely slowly. Now, the progress bar has been stuck for the last ~20 ...
2
votes
0answers
109 views

Boot Partition suddenly inaccessible

I've run into quite a problem - my Mac (mid 2015 21.5" 4k iMac, running Mojave) cant find my boot partition (disk0s2). I've made some headway, it previously just showed it as FFFFFFFF-FFFF-FFFF-FFFF-...
2
votes
0answers
65 views

rEFInd - can boot to Mac Recovery or Ubuntu, but shuts down after loading bar for MacOS

I have rEFInd installed on my 2015 rMBP - I can access the boot menu for rEFInd (although sometimes this doesn't appear / runs very slowly), and all the right options are there, but when I select ...
2
votes
0answers
96 views

Option to boot into Windows missing after Boot Camp Assist

I just completed installing Windows using Bootcamp Assist. I allocated 30 GB to the Windows partition. The process completed after taking a long time (> 7 hours), and a Bootcamp partition has been ...
2
votes
0answers
126 views

Macbook Pro OSX 10.11.6 stopped booting

I tried booting my mac today as usual but it turns out that almost immediately the nasty prohibition sign appeared. I tried the usual stuff: resetting PRAM, SMC and nothing. I tried safe mode, but ...
2
votes
0answers
297 views

How to boot into internet recovery mode with rEFInd installed?

I have the bootup manager rEFInd installed on my Macbook. The key combinations for recovery (Command R and Command R+I) just boot into rEFnd's bootloader. At this point in time holding the option key ...
2
votes
0answers
689 views

SSD RAID card in Mac Pro (Mid 2012) 5,1

question with two parts: Is there any card that has PCIe x4 with AHCI interface (to be bootable on MAC Pro) that takes two M.2 SSD cards? And if teher is does it matter if the SSDs (if the card ...
2
votes
0answers
667 views

Early 2011 MacBook Pro not booting, damaged firmware?

I have an Early 2011 MacBook Pro (A1286). I upgraded it to macOS High Sierra and I sold it to a friend of mine, who returned it back after few weeks because it stopped booting. It always gets stuck at ...
2
votes
0answers
220 views

Keyboard not working during boot

My Mac keyboard is not working during EFI startup, so I can’t press option to select the boot device. I am dual booting Archlinux, so my EFI binary is from systemd-boot. I configured timeout in loader....
2
votes
0answers
649 views

Macbook Flashing Question Mark backup

I had the unfortunate luck of getting the infamous flashing question mark folder when I booted up my 2012 macbook pro. I have never used timemachine before, so I can't call backups. So i've been ...
2
votes
0answers
471 views

How to boot 2015 Mac Pro without monitor

I have a mac pro which I and several colleagues access through screen sharing. It has no need of an external monitor itself. Periodically, it shuts down (perhaps because of university-mandated ...
2
votes
0answers
167 views

Macbook Air Panic on Boot, “Unable to find driver for this platform: \”MacBookAir7,2\"

I have a Macbook Air that isn't booting into macOS. I'm repairing it for a friend, and they said this issue started suddenly for no reason, but I can't be 100% sure. Normally it hangs on the apple ...
2
votes
0answers
324 views

Unable to boot OS X on external HDD on 1 mac but fine on another. No entry sign

I've managed to reformat and install OS X Sierra on an external hard disk with an USB3.0 connection to a borrowed 2015 Macbook Air. The install was successful and the OS was able to boot and work fine....
2
votes
0answers
77 views

Bootable Sierra SD card that doesn't show up in Startup Disk but does mount in finder

I have a bootable Sierra SD card that doesn't show up in Startup Disk but it does mount in finder. I can boot other MacBooks with that SD card but on this one it will not work. I've also tied to burn ...
2
votes
0answers
86 views

What process powers the progress bar during initial boot?

I recently learned that launchd was written and used starting with Mac OS X Tiger. Before it's inception the progress bar would actually give useful information about what process was currently being ...
2
votes
0answers
87 views

Macbook is not starting up / random shut down

I was working on illustrator and suddenly my laptop went off, and is now failing to boot. Random lines are appearing on my screen as it tries to boot. Below is a link to a video I made of the issue: ...
2
votes
0answers
1k views

Installing Mac OS X 10.3/10.4 from USB

I have a PowerMac G4 (AGP) with a working copy of Mac OS 9.2, and a corrupted copy of OS X 10.3. I would like to either reinstall Panther, or upgrade to Tiger. The catch is that for several reasons I ...
2
votes
0answers
454 views

MacBook starts to boot but kernel panics before OS loads, works after reinstall until reboot

For the past 2 weeks I've had a problem: my MacBook Pro starts to boot but doesn't load the OS. I think it is a kernel panic. Here is a photo from the verbose boot. The only way to fix it is to ...
2
votes
0answers
425 views

OSX stuck on boot after switching language

since yesterday my MacBook is stuck on boot after changing language in the systems control panel: Before the login I just see a circular loading indicator and my mouse cursor is stuck in the top left ...
2
votes
0answers
115 views

Firmware Password isn't the one I entered

So the firmware password isn't the one I entered. To avoid the usual onslaught of insinuations that it 'might not be my computer' that usually accompany questions of this nature, I want to state ...
2
votes
0answers
5k views

Create a Bootable Windows 7 USB from a Mac

I found several old threads where similar situations were described with no practicable answer, so I ask again. Please forgive me if I am creating a redundant post but I have read the following ...
2
votes
0answers
573 views

Permanently killing the dGPU on a MacBook Pro, including on startup

I would like to permanently kill the discrete GPU on my 2011 MacBook Pro 15 so that it will always use the integrated GPU, including on startup. (WHY? -- my 2011 15-inch MacBook Pro (2.3 i7 quad ...
2
votes
0answers
10k views

Mac OS X Sierra installation stuck in a reboot loop

I tried updating my system from El Capitan to Mac Sierra. This is my Macbook Pro configuration: Somewhere around 90% of the installation... ...this message appeared on the screen: Then, the ...
2
votes
0answers
105 views

Bootcamp: How do you reboot from Windows to Windows via script in OSX El Capitan?

I'm asking this because I think it would be incredibly useful to myself and other Bootcamp users. I currently have my default boot drive set to restart to my Mac partition and already have a script ...
2
votes
0answers
348 views

Bootable SD Card doesn't appear at Startup Manager

I have a bootable SD Card with Windows 10 installed, and it works fine in the most of macbook pro I have tested, but there is one in which when I press alt / option key, the SD Card doesn't appears ...
2
votes
0answers
96 views

Unable to Boot MacBook using any means after attempted Fedora Install

Wondering if anyone has any last ditch efforts I can try here to salvage my macbook! I recently attempted to install fedora to dual boot on my Late 2011 Macbook Pro, the install crashed, the ...
2
votes
0answers
555 views

Broke Boot Camp while trying to get a triple boot

I'm running Yosemite, up-to-date on a mid-2012 MacBook Pro. I removed the optical drive, moved my internal HDD to its location and placed a new SSD in the original HDD's location. This has been great ...
2
votes
0answers
223 views

Can I keep my Boot Camp partition when moving to a larger hard drive?

I just bought a 512 GB hard drive to replace my 250 GB hard drive, which currently has a Boot Camp partition (pretty vanilla, just running a standard Windows 7 install). I was planning to just clone ...
2
votes
0answers
941 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 ...