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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2answers
35k views

Mac Pro: Any way to recognize a bootable USB on startup?

I have a Mac Pro 2,1 2x6-Core Xeon@2.66 GHz and am trying to boot from several ISO images written to USB sticks. I have tried the dd-based methods as recommended by Ubuntu, with no luck. In every case ...
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2answers
2k views

Security hole in firmware password by installing another boot loader?

I set up a firmware password on my MacBook. One thing I don't understand is how I can install a tool such as rEFIt, and effectively bypass the entire firmware password (i.e. installing it never asked ...
3
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1answer
89 views

EFI Partition Change name and Logo

I've installed Windows again but this time on a external SSD. it's all working fine, but when holding the alt/option key it's giving me Macintosh HD and EFI partition. how can I change this name "EFI ...
3
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1answer
121 views

SSD drive partition showing as FFFF on my MacBook Pro 2010

About three years ago I replaced my original hard disk on my 2010 MacBook Pro with SSD drive to make the system run faster. It did work fine until now. Regrettably I'm in this position now as my ...
3
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3answers
1k views

iPhone Boot loop stuck

The phone has never been jailbroken. Never got wet, anything. But after one night it reboot, and got stuck. The battery overheat and even after a few attempts to solve the issue through iTunes, ...
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3answers
9k views

Lost the Option to Boot into macOS After Windows 10 Bootcamp Installation

Recently I tried installing Windows 10 using Boot Camp on my MacBook Pro. The initial steps went smoothly until the actual windows installation where I was unable to install Windows on Boot Camp drive....
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1answer
5k views

How do I launch an app at boot/startup on Sierra?

I'm a techie but fairly new to macOS. I am using a Mac mini running macOS Sierra as a build machine running GoCD. I want the server (go-server) and the agent (go-agent) to start on boot, but I can't ...
3
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1answer
5k views

Booting from another mac's hard drive

My Macbook recently developed a video card problem, and I got another Macbook, both running Yosemite (though perhaps different subversions). I got my old hard drive out and connected it to my new ...
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4answers
8k views

Is it possible to boot from an encrypted external hard drive?

If I have an external hard drive with a bootable cloned backup (via SuperDuper) - if I encrypt it with the Finder will I still be able to boot from it if necessary? Are there any solutions to enable ...
3
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1answer
502 views

Does Windows, running on latest Apple computers, see boot disk partitioned as MBR or GPT?

From my understanding, the newest apple computers boot Windows in EFI mode. Traditionally, Windows has seen the boot disk as an MBR partitioned disk. In fact, the boot disk (i.e. /dev/disk0) has aways ...
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1answer
45k views

Mac boots into log on screen quickly but takes long time to log into account

I just replaced the stock OEM hard drive on my 2010 macbook pro 15 inch with a Samsung 840 Pro SSD 256GB and installed Yosemite on it from scratch with USB (the first time i am using Yosemite). Now ...
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1answer
23k views

Can I boot Mac from an external hard drive (internal hard drive+hard drive closure)

Model: Macbook Pro 2010 mid OS: OS X 10.9 Hard Drive: WD5000BPKT 500GB For some reason I need to change my perfectly working internal bootable drive to external bootable drive. I took out my ...
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2answers
6k views

Macbook Air not waking up from Suspend/Sleep with rEFInd boot manager installed

Having installed both rEFInd 0.6.10 (updated to 0.6.11) via its install.sh and Ubuntu 13.04 on another partition I can now choose on a MacBook Air to boot either MacOS or Linux. When running MacOS ...
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1answer
10k views

unable to boot my MacBook after FileVault 2 activation

after activation of FileVault 2 I am unable to boot my computer, the apple sign turns into a prohibitory sign with a spinning circle beneath it , that spins forever. I really need the data on this ...
3
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1answer
14k views

How can I make a bootable Windows 7 USB in OS X Lion?

I want to make a bootable Windows 7 USB in OS X Lion. How can I do that?
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1answer
2k views

How can I fix my GPT?

I just migrated from a 120 GB SSD drive to a 600 GB SSD drive. As I was lazy and didn't want to reinstall Mac OS X (Lion), I chose the following migration path: I created at GPT on the 600 GB target ...
3
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1answer
123 views

Mid 2011 iMac 27'' won't boot - 3 beeps and maxed fans

My iMac GPU failed about a week ago causing the OS to get stuck on a white screen with vertical pinkish stripes. I’ve performed a careful teardown to reflow the GPU. While I was at it I took the ...
3
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1answer
135 views

MacBook shows flashing question mark in a folder when battery is at > 70%

I am sure many of you guys know the flashing folder icon which shows up when the Mac cannot find a drive to boot from. My 2017 MacBook Pro has this issue for some time now, but recently I found ...
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1answer
1k views

Can you change an iPhone startup screen background from white to black?

It seems light-coloured iPhones have a white startup background colour with black Apple logo. As you can’t control the brightness on startup - this screen is offensively bright at night - searing your ...
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1answer
6k views

Triple Booting Mac, Windows, and Linux—A boot load nightmare

A few months ago I installed Ubuntu on my mac; I was dual booting. I did so following this tutorial. In this guide, I was instructed to install rEFInd; I did. Everything was good for those few months ...
3
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2answers
35k views

“First Aid found corruption that needs to be repaired”

I was trying to re-install Windows through Bootcamp, and it was stuck at partitioning. I quit Bootcamp, and now in the disk utility I get this error, even when in recovery mode: First Aid found ...
3
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1answer
19k views

fsck -fy hangs on Checking catalog file + issues booting (MacBook)

Last night my MacBook Pro crashed. This morning I tried turning the computer on, and it had a few issues.. Computer doesn't get past initial boot up loading. Fan activates loudly while starting up. ...
3
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1answer
153 views

How can I try to boot a completely stuck Macbook Pro?

I have a retina MBP that according to my mum was working last time she put it under charge (with 15% left). However, as of now, I get no reaction at all after pressing the boot key. The screen stays ...
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2answers
4k views

Macbook Pro.[Mid-2012] Sound isn't working

Suddenly, My MBP sound isn't working. I have tried couple of way to resolve the problem but nothing is working. Here is some of the screenshot: No, input or output sound. I would like to know 1) How ...
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3answers
23k views

Problems creating Yosemite USB bootable drive

I was trying to make a USB boot loader for Yosemite using this command sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled 2 --...
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1answer
2k views

GRUB overwritten Refind/Mac bootloader - Unable to boot

Getting desperate here, need some help background: I have a late 2012 imac, running OS X 10.10 Also i had Xubuntu & OpenSuse running as secondary OSs I was using refind & everything was ...
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3answers
7k views

iMac won't boot off of Mavericks USB when downgrading from Yosemite

I made the biggest mistake of my adult life and installed Yosemite without backing up my HDD. Fortunately, I do have most of my actual files and programs saved to my external HDD, but that leads to ...
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3answers
19k 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 ...
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1answer
1k 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 ...
3
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1answer
82 views

FileVault and scheduled boot

After I have enabled FileVault the computer won't boot anymore at the scheduled time. Is it normal or has something gone wrong? If it is normal, are there any workarounds?
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3answers
5k views

Logging out and in on OS X takes 4-5 minutes?

I've got a 3.4 GHz i7 iMac (8 cores) with 24 GB of RAM. (2 16 GB chips plus 2 4 GB chips.) I know this amount of RAM is "officially unsupported" which is why I mention it. Lately logging out (to ...
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4answers
3k views

Installation stuck at grey boot screen on Macbook Pro 4,1 (Early 2008)

I would appreciate any help you guys can give me since I would really like to upgrade my laptop to Mountain Lion. Computer: Macbook Pro 17" 4,1 (Early 2008) RAM: 4 GB RAM Hard drive: 128 SSD Hard ...
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3answers
15k views

Macbook Pro (Late 2011) Bootcamp and USB boot questions

I have a Macbook Pro with an OWC DataDoubler drive caddy replacing the Superdrive (installed at an Apple premium reseller, when I bought it, so I can still have my warranty). The main drive slot has ...
3
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3answers
1k views

How do I clone a dual-boot Macbook

I have a Macbook Air set up for dual-boot (Lion & Windows 7) and am planning on buying a newer model. How would I go about cloning the entire hard drive to the new machine? Do I need to ...
3
votes
1answer
209 views

Triple boot on MBP 2019 (T2)

My goal was to install onto a 2019 Macbook Pro (with a T2 chip) : OS X Catalina Windows 10 Pro (1) Windows 10 Pro (2) I managed to do so by using Bootcamp for the first Win10, and a bootable USB to ...
3
votes
1answer
88 views

Is my battery in my iPhone faulty, or something more?

I have an iPhone 7. I had the battery replaced approx 6 months ago. I've noticed the battery life hasn't been overly great considering it's a new battery. Yesterday, my phone started turning off at ...
3
votes
2answers
157 views

MacBook Pro 2013 NVME booting Issues

A while back I did an SSD upgrade on my 15" MacBook Pro 2013. The SSD I'm using is an ADATA SX6000 256gb. I purchased the Sintech adapter to use with this drive and I had no issues installing MacOS ...
3
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2answers
26 views

can't boot on win10 without alt (option)

on an air macbook air 2017, I deleted OSX and installed only Windows 10 from a usb cd drive. Everytime I boot the computer, I have to push on ALT to select the only one item: Windows. Otherwise I get ...
3
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1answer
236 views

Fix Windows after Ubuntu installation

I've followed closely this step-by-step guide: https://apple.stackexchange.com/a/257275/322989 After that my Ubuntu 16.04 LTS and Mac installation work perfectly fine. But my Windows 10 does not. ...
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2answers
2k views

tmutil - Failed to delete local snapshot

My mbp is stuck on boot and fsck cannot be performed because of: snap_metadata_val object (oid <aléatoire>): invalid extentref_tree_oid (0x0) It happens that I have dataless snapshot and if I ...
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1answer
2k views

How to Make Bootable APFS Volume From Disk Image

I am currently using terminal to early and quickly add APFS volumes to my Mac's APFS container. Once I make an empty APFS volume in the container, how can I copy a disk image to it and make it ...
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2answers
4k views

Dual boot: I cannot boot in OS-X, after installing Linux (Debian)

After swapping the DVD drive with an SSD, I installed Debian Linux on it. I left the original SSD with OS-X untouched. After a reboot, OS-X (El Capitan) started. After another reboot, pressing ...
3
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1answer
261 views

Install SSD and Windows to Mac Pro 2012

I have what I believe is a Mac Pro from 2012. It has 2 CPUs, 12 GB of RAM a 5770 and no disks. I want to stick an SSD in it and install Windows. The Mac Pro does not currently have any disks and hence ...
3
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1answer
3k views

How do I install Linux on a 2007 iMac that has its operating system uninstalled?

I'm in a bit of a pickle. The iMac will prompt me to reinstall OSX Lion, but it only has 1GB of RAM, and the Lion upgrade requires 2GB, so it doesn't allow me to do that. Since the computer was ...
3
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1answer
734 views

I am unable to boot my mac in El Capitan and Single User mode

I am unable to boot El Capitan. When I turn on the computer it seems to load fine for a while, but then this screen shows up: When I try to boot into Single User mode, it stops loading at this point:...
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2answers
4k views

Funny Apple Logo colors during startup

When my iMac boots up the apple logo and progress bar flicker red very briefly. There doesn't seem to be anything else the matter with the computer apart from this. It's a very new retina iMac running ...
3
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3answers
6k views

Mid-2010 Macbook Pro won't boot after trying to install macOS Sierra

After I ran the macOS Sierra installer to start installation, my 2010 Macbook Pro wouldn't start anymore. It would get to the grey startup screen, flash the Apple logo for a second, and then switch to ...
3
votes
2answers
7k views

Old Mac OS X, cannot get admin access, boot safe or single-user mode, nor reinstall

I have inherited an old Mac OS X 10.5.8 + original install DVD. Model: Power Mac G4 Identifier: PowerMac3,6 Processor: PowerPC G4 (3.2) DVD: Mac OS X Leopard Install DVD Version 10.5 I'm trying to ...
3
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3answers
3k views

Boot up error prohibitory sign flashing folder with question mark

3 weeks ago my hard drive failed so I bought a new one. (Macbook pro late 2011) 5 days ago, the new one flashed prohibitory sign, flashing folder with question mark. Every once in a while I could get ...
3
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1answer
4k views

Boot iMac G5 17 iSight from external USB optical drive?

Is it possible to boot iMac from external USB CD-ROM?

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