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 Booting Issue

I have a Macbook Pro 15" Retina Mid 2014. Off late, whenever i put my mac to sleep and when i try to wake it up, it doesnt! I need restart it, but then it takes lot of time and just hangs at the end ...
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1answer
21 views

Mac Freezes on Launch

Mac running 10.14.5 is freezing after the login screen each time I reboot. Seeing these stange messages in /var/log/system.log that seems suspect. com.apple.xpc.launchd[1] (com.apple.CloudDocs....
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2answers
1k views

Startup Disk full - Read-only- cannot boot Mac Mini

I'm at my wits end with this issue. Hours of searching various forums have produced glimmers of hope, but nothing works. First - mea culpa - I have only myself to blame. Short Version: I wiped my ...
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0answers
29 views

Screen turns black for a while after logging in

After I typed my password and the Apple logo appeared, suddenly my screen turned black for a while and after a few seconds it went back to finish its loading bar progress and logged in normally. Is ...
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0answers
29 views

Macbook Pro a1278 fails to boot [closed]

i have a personal Macbook Pro a1278 that fails to boot. I made the choice to contact an Apple service who changed the SSD and my antivirus failed to start not having the right permissions. I did not ...
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26 views

Overdrive the fans but fails to boot [closed]

Hello for about 3 weeks i have a problem with a virus. I did contact an apple service and after changing the SSD the problem still persist. For the Macbook pro a1278 i have, i need to find the BIOS ...
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2answers
195 views

Your computer is disabled. Try again in 60 minutes

I need to factory reset a MackBook Pro. Every time I start it up it takes ages to load and then I see this: Your computer is disabled. Try again in 60 minutes. I tried to restart the Mac with CMD +...
43
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3answers
67k 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 ...
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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 ...
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0answers
13 views

How to setup properly Clover EFI?

I need a little help to how to setup Clover Bootloader - to handle a dual-boot on a late 2008 unibody Mac(Intel dual-core 2GHz, 4GB). This Mac is already containing two partitions - see below - but ...
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1answer
15 views

Can't access Recovery Mode (2011 Mac Mini)

I was gifted a 2011 Mac Mini and I decided to try and get the thing up and running with a recent enough version of MacOS. When I turned the thing on, I was greeted with a fast boot to grub, indicating ...
2
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1answer
23 views

MacBook Pro (2011) shows flashing folder at startup but the disk is valid

I have a MacBook Pro (early 2011) and recently the laptop boots to a white screen that flashes a folder with a question mark. I know that means the laptop cannot detect an available startup disk. I ...
3
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1answer
76 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 ...
2
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1answer
21 views

Reinstall macOS on Ubuntu MBP

After an update broke my 2015 MBP, I installed Ubuntu 18.04 on it (via USB). Now I want to go back to MacOS. When I boot into recovery mode (cmd+optn+R), I reach the usual menu of options. When I ...
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1answer
889 views

Run Python Script on computer boot

How can I create a python script that runs when the computer boots? I know to get it to run on login I can turn it into an app and add it to a as a startup item in settings, but I need it to run once ...
4
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1answer
9k views

How to use Boot Camp Assistant to create a dual OS X, Ubuntu system?

I would like to use Boot Camp Assistant to partition my HD, reserving around 30 GB for Ubuntu. I would then have a dual OS X Yosemite and Ubuntu Linux system. This used to be fairly easy. Boot Camp ...
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0answers
14 views

How do I install El Capitan and ParrotSec dual-boot? (without Kernel Panics)

ParrotSec was installed on this machine and it was running fine - meanwhile I could not reach it from Grub2 because if I chose MacOSX-32bit/MacOSX-64bit it popped back a Kernel Panic. On the other ...
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1answer
54 views

No install location available in Mac Internet Recovery

I tried to start my Mac & a folder with a question mark appeared. I researched on Google and discovered it was a problem with the Boot partition. I saw how to fix it. I used Opt ⌥ while booting ...
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0answers
34 views

MacBook Pro late 2013 (Model: A1502) won't boot or respond to any Input

I have a big problem with my MacBook Pro late 2013 it does not boot or light up in any way. Current behavior The only reaction that I get is, when I connect it to the powercord and start with the ...
0
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1answer
18 views

Macbook stuck at login screen

My macbook is stuck on the login screen after entering the password. I've been using this MBP for the past 4 years and it's been slowing down of late. However, I'm now having trouble logging in to my ...
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0answers
40 views

Getting the “prohibitory” symbol on startup

I have a mid-2004 PowerMac G5 that until recently was running fine. It had OS-X 10.3.5 installed. At one point the screen froze, no mouse, no keyboard. I powered it down and back up again. That's ...
1
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1answer
21 views

MBA 2017 won't boot up in macOS, but will in Ubuntu

A few days ago my spouse's MBA started showing problems. At first it wouldn't turn on at all, showing an orange indicator on the MagSafe charger. After resetting the SMC a couple times and letting it ...
4
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3answers
58 views

MacBook Pro 15" 2008 freezes with colorful screen

Starting a few days ago my Mac froze mid usage, was using Chrome when it did it. I got all these crazy colors everywhere, and it froze. I turned off the power, waited a few, then turned back on. It ...
1
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1answer
21 views

MBA (2013-15?) wont boot from macOS boot stick

A friend of mine somehow managed to delete his internal drive including the recovery partition while trying to reset his MacBook to factory settings. Now when trying to boot up the MBA only displays ...
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1answer
3k views

iMac (mid 2011, OS X 10.12) gets stuck on white screen on boot, all DIY options exhausted?

iMac (mid 2011, running OS X 10.12) gets stuck on white screen (after playing the chime sound and displaying the Apple logo and progress bar) when I try to boot normally boot in safe mode (holding ...
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0answers
60 views

MacBook Pro 13" Mid-2010 - upgrade HDD to SDD with intermittent Prohibitory sign

Good morning folks, I can't wrap my head around this one. I recently upgraded a failing 250 GB HDD to a 1 TB SSD and transitioned the data using a hard drive duplicator. When starting from a cold ...
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0answers
18 views

How do I prevent repeated iCloud logins when switching boot disk?

I've several different APFS bootable volumes. When I restart, and switch from MacOS 13 to 15, or back to 13, after I log into my user account, I'm asked to re-authenticate on iCloud. It seems that ...
2
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2answers
394 views

“No administrator was found” in Startup Security Utility

My friend got a new MacBook Pro from office, later on he resigned and in a hurry erased the "Macintosh HD", now we are trying to install Mojave using Bootable USB but it won't allow because "External ...
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0answers
54 views

How to get DMG file for making macOS USB on Windows PC?

I saw this discussion and updates on StackExchange on making macOS USB on Windows. I'm unable to comment there, so I'm posting a new question. I have been trying everything from that page, but as of ...
9
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4answers
13k 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 ...
15
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8answers
428k 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. ...
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1answer
16 views

Macbook shut itself down during sleep and won't boot unless leave it for a few days

model: macbook 13'3 with retina display (2013 late autumn) OS: 10.10.5 symptons: The macbook shut itself down while I put it to sleep with amost 60% battary left; Won't turn on by pressing power ...
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1answer
27 views

Can't boot from USB or reset PRAM/NVRAM on mid-2006 iMac

I got a free mid-2006 iMac from a friend, and while it boots to the login screen, all the user accounts are password-protected, so I've decided to try reinstalling Mac OS X Leopard. I created a ...
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0answers
24 views

Mac boot partition FFFF (High Sierra) [duplicate]

I know many people have had similar kind of issues and I tried to fix this with the answers I found but with no luck. Device: iMac 27" mid 2011 OS: Latest High Sierra (I think the recovery mode is ...
2
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1answer
4k views

How to check if a Firmware Password is enabled in OS X?

I do not know how to check if Firmware Password which prevents changing the OS Startup Disk options is enabled on my Macbook Air 2013-mid with El Capitan 10.11.4. How to check if Firmware Password ...
4
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1answer
42 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 ...
3
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2answers
195 views

MacBook Air not booting, Boot loader not available, Internet recovery not available

Recently I tried to factory reset my Mid 2012 MacBook Air. In order to do that: I booted into Recovery mode with Command + R. Then navigated to Disk utility and Erased Macintosh HD. Then I restarted ...
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0answers
27 views

Problems with bless tool

The computer is an early 2015 13" MacBook Pro. Two weeks ago we sent my spouses 15" in for battery recall, and bought an OWC Aura Pro to replace my internal 1GB SSD (we SuperDuper'd her 15" MacBook's ...
1
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1answer
90 views

How to stop macOS updates from taking over the rEFInd boot manager? [duplicate]

I have rEFInd installed on the EFI partition of my 2015 MacBook Air. Every time I update macOS, it ends up taking over the bootloader and resetting it to using the macOS operating system. Afterwards, ...
0
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1answer
414 views

Black screen with cursor & black touchbar

I have rebooted by MacBook Pro 2018 (with macOS Mojave installed). Everything went well: I was prompted for my account password and then the system started loading. Here start the bad things: control ...
0
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1answer
30 views

System fails to recognize main macos boot partition after Ubuntu dual booting attempt

I recently attempted, and temporarily succeeded, in dual-booting Ubuntu and MacOS Mojave on my MacBook Air. After I installed and successfully tested Ubuntu, I tried to use Disk Utility to create a ...
2
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4answers
12k 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 ...
1
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3answers
110 views

Is it possible to downgrade Boot ROM SW to try and fix unbooting Late 2012 iMac from Single User Mode?

I currently have 283.0.0.0.0 Boot ROM SW installed on my crippled Late 2012 iMac - which I upgraded HDD->SDD, tried to unsuccessfully install Mojave, then broke fusion setup, erased drives and am now ...
6
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4answers
40k 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):...
1
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1answer
696 views

Resetting screen brightness setting in touchbar MacBook Pro during boot

Due to a series of unfortunate events, my 2018 15” MacBook Pro found itself out of battery and with screen brightness set to zero. I should also mention that I have FileVault full disk encryption ...
1
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2answers
1k views

iMac loading bar gets stuck halfway then reboots

OSX 10.11.5 iMac turns on fine but loading bar gets to just over 50% and then a horizontal bar across the screen shows, then the screen goes black then to white. It stays at white then iMac turns ...
0
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2answers
10k views

Windows support software could not be saved to selected drive, Error Installing Win 10 on MBP2017. I Already did SVC, MVRAM reset

I have already did SMC and NVRAM Reset, and also using first aid on my single partition drive. Still doesn't work. First, before I was used first aid, and did NVRAM- SMC reset. The title is "Disk ...
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0answers
30 views

Mac Pro just turns off instead of entering safe mode

I'm trying to deal with an old Mac Pro (I'm not sure how old) which will not boot - it shows the grey screen with the Apple logo, and the progress bar rushes up to 50%, then slowly creeps up to 100%, ...
6
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1answer
39k 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 ...
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2answers
1k views

How can I create a bootable windows 10 usb installer on Mojave?

Boot Camp Assistant no longer allows to do this dd shouldn't be used for bootable sticks (see here) Using unetbootbin I can only write on FAT32 formatted USB, but that does not work (see here) How ...