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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1answer
14k views

How to create USB Ubuntu boot disk in OS X so that it boots on *non-Apple* computer?

While this seems like a straight forward task, the few methods I've tried so far don't create a USB device that my Dell computer will recognize as a valid bootable USB drive. Here's what I've tried ...
4
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1answer
7k views

Can I boot Linux (any distro?) from USB on a MacBook Air that has no hard drive?

I've a MacBook Air that has burned out three hard drives from OWC. The original drive is gone somewhere, and it no longer makes sense to purchase a replacement. The rest of the hardware is in good ...
4
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1answer
10k views

How do I change the default boot option on rEFIt?

I have two copies of OS X (10.6 and 10.7). By default rEFIt boots 10.6. However, I want to make it boot 10.7 instead. How do I do this?
4
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1answer
3k views

How do I boot into the EFI firmware shell?

I'd like to experiment with the EFI shell on a MacBook Pro 2010 model. I am unable to find the keyboard sequence to hold on boot. Does someone know what the sequence is, do I need to boot from my ...
4
votes
2answers
230 views

External SSD no longer bootable

I have a Mac Mini (late 2014) with its stock internal drive and an external SSD via USB. The external drive has Sierra and this is what I always boot from. The internal is a clone of the external just ...
4
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1answer
3k views

How to stop mac from default booting in deleted windows via boot camp?

I bountied this question Boot into Mac from Windows after failed Bootcamp after being trapped in Windows hell on my mac, after the first time using boot camp. When I got back to my mac I erased ...
4
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1answer
644 views

What would be the cleanest method of converting my APFS macOS partition back to HFS+?

After installing High Sierra when it was released, I was initially happy with APFS and gave no care to its relative novelty. Recently I've been using Linux, macOS, and Windows, and having to reboot ...
4
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2answers
1k views

How do I find the Apple startup chime/sounds on my computer?

How do I find the Apple startup chime/sounds on my computer? I know there has to be someway for it to be stored, but I'd just like to be able to access the file/raw binary...
4
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1answer
4k views

Is there a faster way to restart macOS Sierra into the bootcamp partition? [duplicate]

When I'm in windows under bootcamp all I need to do to restart into macOS is Right click the bootcamp icon in the task bar Select "reboot into macOS" When I'm in macOS and I want to switch to ...
4
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2answers
2k views

On lid open Macbook Pro 2016 boots automatically - after turning off I need to juggle 10 seconds with the touch id power button to boot

I have the late 2015 (15 inch) MacBook Pro. By default it turns on when laptop lid is open. This is not good for me, sometimes I open the lid on weak battery to make sure it's not turned on, so I ...
4
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2answers
3k views

MacBook Pro 2011 shows grey screen during boot

My early 2011 MBP stopped booting up. It now shows only a grey screen after about 1/3 of the boot up process. I tried Verbose mode, where the last lines visible before the grey screen can be seen in ...
4
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5answers
29k views

Thin green lines on boot, then screen goes grey (late 2011 MBP – 8,2)?

Last night I was using my late 2011 MBP (higher res screen, dual Intel/AMD graphics), and the screen suddenly went black. I left it go for a minute - no change. I open and closed the lid – it ...
4
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1answer
4k views

How to boot Linux from Mac using rEFInd

I have successfully installed rEFInd on my MacBook Pro 2015 so I can boot into Linux however I cannot seem to boot into it. Here are my issues (both with Ubuntu 64x Mac CD and Kali Linux 64x USB). ...
4
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1answer
2k views

Trapped: MacBook always shuts down during EFI SMC Update 1.8. Can't boot. How to remove updater from boot routine?

MacBook Pro i7 Mid-2012 (MacBookPro9,2) running Mac OS X 10.8.5: Downloaded the "offered" EFI SMC Update 1.8 through the AppStore Updates. MacBook restarted, grey progress bar appears w/ spinning ...
4
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1answer
3k views

How do I prevent automatic mounting of all the partitions on a flash drive?

I have a flash drive that I use for various diagnostics on macs. Most of the partitions on the drive are accessible by holding down the option key on boot. I also have one extra partition that is not ...
4
votes
1answer
74 views

Need to replug my Magic Keyboard after each shutdown

Each time I restart my 2018 Mac mini running Mojave after a complete shutdown, I have to connect my Magic Keyboard (to USB) to be able to type my login/password. Once it's done, I can unplug it and ...
4
votes
1answer
1k views

Mac stuck after trying to install updates, startup disk missing

I tried to install some updates on my Macbook Air. I received a notification asking if I wanted to restart the Macbook to install the updates, I accepted and restarted. When booting, the Apple logo ...
4
votes
1answer
74 views

Cloning macs within a context of no internet access

I'm shipping a project which my client (the army) wants to run on new MacMinis2019, which they, being less tech saavy consider a whole (the mac with all the software and configuration installed on it ...
4
votes
1answer
573 views

macOS 10.12: MacBook Pro Retina takes hours (literally) to boot

I've got a mid-2012 15" MacBook Pro Retina (MacBook10,1 - i7-361QM - 8GB RAM) running Sierra 10.12.6 (16G1036) that can take, literally, several hours to boot. I am not able to boot into recovery or ...
4
votes
3answers
15k views

What causes 5 pink bars on 27" iMac (2011)?

I've got a 27 inch iMac made in 2011 that displays 5 pink vertical bars on the screen. It won't boot properly. I ran the Apple Hardware Test and it came up clean. Machine Specs: Apple Subfamily: ...
4
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2answers
591 views

Mac boot menu not showing up with different keyboards

I have a Macbook White from 2010. I have been using it for a while and everything works except the internal keyboard which is broken because of a tea spill. An external PC-keyboard (USB) is attached ...
4
votes
1answer
12k 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, ...
4
votes
1answer
2k views

Apple recovery partition possibly creating problems in Ubuntu

Before reading, it may help to know I have a 13" Macbook Pro (model 7,1. Mid-2010). Recently, the HFS+ filesystem on my OSX became corrupt and after many trials and errors, it was clear I was going ...
4
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1answer
2k views

Macbook Pro Early 2011 15 inch, Mountain Lion Booting issue

My Macbook Pro is not booting normally. I tried many options but no success. If I try to recovery mode or try to boot from USB, a blue screen appears. So I can't do fresh install. I checked hardware ...
4
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2answers
696 views

How to set up an iMac not to look for USB Flash drive info during boot up?

Short question: is there a way to disable an iMac's USB Flash Drive boot up so that boot up time is faster? Details: My iMac has an external USB hub, and it has 3, 4 or sometimes 6 or 7 USB Flash ...
4
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2answers
28k views

Boot from USB on MacBook 1.1 (early 2007)

I’m trying to install Windows 8 from USB on my MacBook 1.1 (early 2007). I have tried booting using rEFIt (on 10.6): Partition my USB key as MBR: the Windows 8 logo fish stays stuck forever. ...
4
votes
1answer
244 views

Mac Pro failing to boot

Two times now, over the last 3 weeks my Mac Pro is failing to boot. Once on, it stays on the blue screen with the spinning icon and never gets to the login screen. To remedy this I boot from install ...
4
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0answers
178 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
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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
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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
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0answers
5k 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
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0answers
692 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
votes
2answers
941 views

Turning off Apple hardware checks on startup

Since I stay on top of possible hardware errors using utilities, I don't want to allow my Mac to boot up and go through the checks each time. How do I skip over this process each time the computer ...
3
votes
4answers
11k 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 fails,...
3
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1answer
5k views

Installing Ubuntu 16.04 server on Mac Mini 2006

I have liberated an old 2006 Mac Mini (Model: A1176) from being thrown away and wanted to use it as a Time Capsule for my other Macs. To do this, I want to install Ubuntu server 16.04 LTS to roll my ...
3
votes
3answers
55k views

Gray screen after installing Yosemite

Yesterday I updated my 2012 MacBook Air to Yosemite. Everything was good, everything working great, but, at the end of the night, my laptop’s battery was low so I decided to shut it down, instead of ...
3
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3answers
35k views

Need a bootable OS X installer iso [duplicate]

I removed the OS X partition off my HDD and installed Ubuntu. Now I want OS X back but I can't install it considering I have no access to Mac OS X. I need either an OS X Snow Leopard or OS X Lion .iso ...
3
votes
4answers
20k views

OSX Prohibited symbol on Boot (High Sierra Update Caused)

ive been researching and fighting this for a couple days now. I tried recovery boot, disk utility, repair etc.. nothing seems to fix this... heres what happened.. this 'puter was just fine, nothing ...
3
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1answer
5k 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?
3
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1answer
2k views

Upgrading new Mac Mini to have SSD. Do I have to buy Lion, or can I just re-download from App Store?

EDIT: The accepted answer below works, but I can also confirm that just booting the stock machine and visiting the App Store, you can just re-download it and make a boot USB drive before swapping out ...
3
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3answers
8k views

How can I reset the PRAM if Recovery Mode keeps overriding the PRAM command?

Lion uses the ⌘ + R to boot into recovery mode. Resetting the PRAM in anything less than 10.7 was ⌘ + ⌥ + P + R. Recovery mode now seems to override the PRAM command. Does anyone ...
3
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2answers
767 views

What can I do when macOS does not boot an APFS volume anymore and I cannot unlock it?

I have an SSD, which until this morning I booted from through an usb3-to-sata adapter. I shut the computer off, removed the drive and came back to the Macbook hanging on a black screen when trying to ...
3
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2answers
1k views

High Sierra restored from ISO to USB drive stops at the stop sign

I've restored macOS High Sierra ISO file (downloaded from Torrent) to pendrive (16GB SanDisk's Cruzer Dial) using Disk Utility, however when booting from it (by pressing Alt and selecting the drive), ...
3
votes
3answers
27k views

How to convert a drive from the GPT format to the hybrid GPT/MBR format when using High Sierra (macOS 10.13.2)

Previous versons of OS X and macOS automatically converted pure GPT drives to hybrid GPT/MBR format when the 2nd, 3rd, and/or 4th GPT partitions were formatted "MS DOS (FAT)" by the Disk Utility ...
3
votes
2answers
1k views

No startup / boot chime; how to bring it back?

I'm one of the lucky (?) guys who managed to get a new MacBook Pro 2016 (the version that introduced the Touch Bar). This MBP model does not have a boot chime by default. There are documented ways ...
3
votes
3answers
98k 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 ...
3
votes
7answers
90k views

MacBook Pro can't boot: shows Apple logo then grey screen

There is a MacBook Pro from 2012 with Mountain Lion that won't boot. The Apple logo is showing, the spinning wheel and then it just goes to a solid grey screen. I've tried to hold Cmd+R while booting,...
3
votes
1answer
72k views

Can't start up MacBook Pro from OS X install discs

I wanted to re-install my mid-2010 15-inch MacBook Pro (Intel Core i7 2.66 gHz 8 GB 1067 MHz DDR3 RAM) which is currently running Mac OS X 10.6.8. I inserted the retail Mac OS X 10.6 install disc, ...
3
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3answers
18k views

How do I install Linux on an Intel iMac with no OS nor CD drive

What I want: Linux on an Intel iMac (Core Duo). What I have: An empty PC (17" Intel iMac) with broken CD drive. It's model A1173. This PC with Ubuntu 12.04 and an old Windows Vista partition. a ...

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