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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111
votes
3answers
252k views

Creating A Bootable USB Of Windows 8.1 On OS X?

Reasons for wanting create such a usb include: PC is unbootable and you want to prepare a bootable USB using the ISO file that you have on your external hard drive. to install Windows 8.1 on Mac ...
54
votes
2answers
136k views

How do I set OS X to boot by default?

I set Windows 7 to my Boot Camp. Windows 7 starts now by default in the normal boot. However, I want that OSX boots by default and Windows 7 only as I press ALT and then select it. How can you set ...
52
votes
4answers
117k views

GPU problem - Boot Hangs on Grey Screen

I found this according to my problem in this thread: Boot hangs on grey screen (even when booting from USB drive with fresh OS X install) My MacBook Pro 15" Early 2011 with AMD Radeon HD 6750M ...
42
votes
5answers
38k views

How can I run/stop/relaunch an application automatically, at boot/login/some other time?

How do you make a script or app to run or stop running automatically when the system is booted, a user logs on, at a specific time, when a disk is attached, etc.?
36
votes
5answers
73k views

How do I make a bootable USB OS X installer on a Mac?

Does anyone have a Terminal command-line recipe for making a new bootable USB flash drive for one of the new MacBook Air's? Is there a way to dd copy the USB boot device that comes in the box and ...
34
votes
4answers
375k views

Create a Bootable Windows USB from a OS X to work on a PC

What I need to achieve is Create a Bootable USB drive from Windows 7 iso image using a Mac running. Use the flash drive to boot and install windows on a PC (not Mac) What I'm looking for is an app ...
31
votes
2answers
30k views

My Mac repeatedly beeps three times on startup. What does this mean?

When I try to boot my Mac I get nothing but strange beeps. They beep as follows: BEEP BEEP BEEP [3 second pause] BEEP BEEP BEEP [3 second pause] and it continues until I power off. So far, I have: ...
26
votes
5answers
125k views

How to install OS X Mavericks in VirtualBox?

I have been trying to use Hackboot to install OSX Mavericks in VirtualBox, and using an ISO image created by following the steps at How to create bootable ISO for OS X Mavericks The steps I have ...
23
votes
3answers
137k views

What are next steps when fsck reports “could not be repaired after 3 attempts”?

My Mac Book Pro 13.-" doesn´t get past the grey booting screen with the apple and the spinning wheel (The loading bar appears but when it´s done nothing happens) I have 220 GB in one single ...
22
votes
4answers
102k views

Repair disk from single user mode (fsck fails)

Earlier today my 2009 iMac emitted I/O errors trying to copy files. So I ran disk utility, verify disk to see if anything was amiss. It was. But as it's my startup disk I couldn't repair it, so I ...
20
votes
1answer
3k views

Mac no longer boots

I’ve been using my Mac all year without fear. On Tuesday I shut it down as I was going out of town. Today, I tried booting up my Mac and it won't boot. I tried resetting PRAM and SMC, but no go. I ...
20
votes
5answers
313k views

Macbook Pro not detecting bootable USB with Yosemite

I created a Yosemite boot USB, from the App Store version 10.10.1. When I hold option during Boot, the USB drive doesn't show up on the menu. I have an aluminium MBP, bought in 2009. It is the full ...
19
votes
13answers
113k views

How to permanently disable (defective) graphics card in MacBook Pro?

My graphics card has malfunctioned and is preventing my MacBook Pro (2011) from booting. Based on my research I will have to otherwise have the logic board replaced. The defective ATI graphics card ...
19
votes
5answers
81k views

Boot hangs on grey screen (even when booting from USB drive with fresh OS X install)

My MacBook Pro 15" Late 2011 (MacBookPro8,2) with AMD Radeon 6770M exhibited display corruption and associated system crashes/resets over a period of two weeks before it entirely failed to boot. The ...
18
votes
3answers
177k views

How do I get into boot options with a non-mac keyboard?

I boot my mac mini, hold down alt on my non-mac keyboard, but it does not go to boot options. How do I get to boot options with a non-mac keyboard then?
16
votes
5answers
68k views

How do I get rEFInd working with OS X 10.11 El Capitan?

I noticed that I could not install and use rEFInd after upgrading to OS X 10.11 El Capitan. This restricts me to OS X so I cannot boot my Linux partition. I get the following error: error "Could not ...
16
votes
8answers
511k 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. ...
15
votes
6answers
25k views

How can I change the title of a boot image?

I have an external Hard Drive with two bootable partitions on it. The first is an image of a Mac OS X 10.6 Install DVD, and the second is an image of a Mac OS X 10.6.3 Install DVD. When I plug the ...
15
votes
7answers
86k views

MacBook startup problems - mouse and keyboard not working at login / stuck on apple logo

Today I restarted my Mac after several weeks uptime. After restart, I got the login screen with unresponsive keyboard and mouse. Right before this problem I had Aperture open, with a problematic ...
14
votes
4answers
105k views

Macbook Pro stuck after I enter my password

For last 2 days I am not able to login to my MacBook Pro. It was working fine and suddenly for no reason after I last shutdown my mac I am not able to login. The mac starts up fine and goes to the ...
14
votes
7answers
82k views

How do I make my 1.5 GHz PowerBook G4 boot from a USB stick?

I actually want to boot Linux but since that is not working I'm thinking some one might know on the Apple end. If there's a way to boot Mac from a USB stick, then booting another operating system ...
14
votes
1answer
2k views

I mistakenly disabled all services in Yosemite (10.10), now it can't boot

I ran: sudo launchctl unload -w /System/Library/LaunchDaemons/ by mistake, now my Mac does not boot... Any idea how to fix that? OS version: Yosemite.
14
votes
3answers
88k views

Boot camp install of Windows 7 issue, no bootable devices

So I have a 2010 15" macbook pro (MBP6,1) and I replaced the optical drive with a hard disk. I wanted to install windows 7 on the hard disk with boot camp with a USB and ISO image. After searching I ...
13
votes
5answers
4k views

Installing 20+ operating systems on Mac without any virtualization

For a scientific project I need to install these operating systems on my Mac Pro. The catch is... It has to run on a native hardware, no level 1 or 2 virtualization is allowed. Here is the list of ...
12
votes
6answers
137k views

How can I disable Safe Boot or the Shift Key?

After a spill on the keyboard of my unibody MBP 17", the ⇧ key reports as always on. Under Windows (BootCamp) and Linux (LiveDVD) I can easily get around the problem by using an external ...
12
votes
1answer
14k views

How can I triple boot MacOS Catalina , Ubuntu 18.04, and Windows 10

I currently use the mid-2014 MacBook Pro. I have read the similar questions asked but as I don't have much technical knowledge I thought I should create a new question. Device History I had ...
11
votes
3answers
40k views

“Battery not charging” on MacBook Pro

I have the infamous "battery not charging" problem on my 2014 Retina MacBook Pro. The power source shows as "Power source: power adapter". I checked system info and I have 1100+ cycles, which I guess ...
11
votes
2answers
5k views

How to disable single-user boot (command S)

By default, Macs are extremely insecure if somebody can get physical access, as they can simply shut it down, press the power button, hold command-S, and there, they get root access in 5 seconds. Is ...
11
votes
2answers
63k views

Always boot windows, unless option is held down

I have a 2012 Retina Macbook pro I use for work, with software that is windows only. I'm getting a bit tired of having to remember to hold down the option key every time I reboot. I know I can tell ...
10
votes
4answers
30k views

Single-User-Recovery-Mode on High Sierra 10.13.6

Before the High Sierra update to 10.13.6 I was able to boot in single-user-recovery mode by holding Cmd-R-S at startup, but after the latest software update booting while holding Cmd-R-S just enters ...
10
votes
1answer
9k views

OS volume shows as type 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF' [duplicate]

Yesterday, I have tried to delete an Ubuntu partition. Since, my Mac (13", MBPro mid-2014) doesn't boot. Now, I boot on Mac OS copy with an USB. i follow different subject of this forum (like this : ...
10
votes
3answers
40k views

What does a non-booting macbook displaying a lightning bolt mean?

I returned to my MacBook after a few days of not using it, and there was a message that the system had run out of application memory (weird...). So, I followed the recommendation and Force Quit a ...
10
votes
1answer
16k views

How to start to recovery mode in a Mac OS X VM in Parallels?

Is it possible to start into Recovery/Internet recovery mode in a virtualized Mac OS X in Parallels? It would come in handy to take screenshots of those UIs or running apps to exemplify some steps ...
10
votes
5answers
28k views

How to create a Windows 10 bootable USB on a Mac for PC without Bootcamp, when install.wim is too large

My Boot Camp assistant seems to be having problems (first I get not enough space, 40 GB, etc.) which I fixed by making a partition using Disk Utility, but then I didn't get an option that others seem ...
10
votes
3answers
80k views

Windows boot camp option missing in Startup Disk selection

I have a Mac Pro (early 2009) running Yosemite 10.10.2, all up to date. Yosemite is installed on my primary SSD (I have 2 additional magnetic drives). I use Boot Camp, and have Windows 8.1 installed ...
10
votes
1answer
4k views

Prohibitory sign on boot after Sierra update, can't mount disk anymore

A few days ago I decided to update to Sierra from El Capitan on both the disks on my MacBook Pro (mid 2012); the update on my SSD went without a hitch so I decided I'd update my other disk, too. I ...
10
votes
2answers
14k views

Triple boot macOS High Sierra, Ubuntu, and Windows without rEFInd

I currently have three OSes installed on my 2017 MacBook Air: macOS, Ubuntu, and Windows 10. I couldn't boot into Ubuntu without rEFInd, but I strongly prefer the default boot manager, because I want ...
10
votes
1answer
11k views

iMac restarts instead of shutting down

I have a problem with my iMac restarting when it should be shutting down. This doesn't happen all the time but appears to happen more frequently when I've had the computer on for a few hours. What ...
10
votes
0answers
4k views

Is there any way to prevent a MacBook Air (2019) from powering up when an input device (keyboard or trackpad) is touched or the lid is open?

While I know there is a hack to prevent MacBooks — 2016 and higher — from starting up when the lid is open, I would like to know if there is a similar hack to prevent a MacBook from powering up when ...
9
votes
4answers
19k views

Is it possible to install an old version of Mac OS on a new Mac?

I know that Apple doesn't want me to run a version of Mac OS older than the one my Mac came with, but is there a way around this? For example: if I buy a new Retina MacBook Pro, is there a way to run ...
9
votes
1answer
610 views

Is this possible? Prevent Live-Linux from booting and grabbing your files without encrypting your disc?

I am a medium-experienced Power User with knowledge about most of the stuff (studying this since two years) and I know something about how Linux and Windows work; I have screwed up countless ...
9
votes
4answers
66k views

Boot into Mac from Windows after failed Bootcamp

Don't hate on me too much for this one... I put Win8 on my Mac Mini using Bootcamp, and all was well. I switched back and forth a couple times between the two with no problems. The problem started ...
9
votes
5answers
15k views

Is there a way to power up a Mac Mini remotely?

Is there ANY way to Power Up a Mac Mini remotely? Just to be clear, I don´t mean wake up from sleep but boot up.
9
votes
3answers
18k views

Where to see kernel startup messages after boot?

I set my kernel to boot up verbose using sudo nvram boot-args="-v" These logs are what I wanted to see, but how can I view the log after booting? I searched all log files without success.
9
votes
4answers
5k views

Why have 5 different iMacs developed corrupt OS X partitions when the physical drives are fine?

I'm a tech for my local school district and we are having some problems with our iMac Multimedia Lab. Over the past nine months, 5 of the 22 iMacs have suffered from filesystem corruption. The only ...
9
votes
1answer
65k views

How to install Windows 10 into a 2011 iMac without using the Boot Camp Assistant, an optical (DVD) drive or third party tools?

Apple does not support Boot Camp Assistant installations of Windows 10 on 2011 and earlier iMac models. The exact list of supported Mac models is given below. The following Mac models support 64-bit ...
9
votes
4answers
69k views

Mac won't boot from USB drive: Prohibited sign

I tried to clean install OS X El Capitan on my Mac, but it won’t boot from the USB drive. Here are the steps I took to create the bootable USB drive (I have a Mid-2014 MacBook Pro with Retina Display):...
9
votes
5answers
3k views

What would it take to make an iPad support multiple user accounts?

As a mobile computer, the iPad is very personal, but it also begs to be shared. And that's a problem. I don't want my friends to be able to check my emails or delete my high score when they play with ...
9
votes
3answers
35k views

Keyboard and touchpad are not working when booting from live USB

I have a MacBook Pro (mid 2017, 13", no Touch Bar) and I want to create Linux live USB. However, keyboard and trackpad are not working when I'm booting Linux OS from live USB. I'm able to select EFI ...
8
votes
5answers
29k views

OSX El Capitan - cannot make bootable usb stick with boot camp

I meticulously followed this tutorial, and this worked for me in 2014. I have a 4GB usb stick plugged into the computer. It should be enough for windows 7, a partition which no longer boots and I am ...

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