Questions tagged [boot]
Questions about booting, the process of starting a computer and putting it into a state of readiness for operation.
1,406
questions
1
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1answer
18 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 ...
1
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0answers
50 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 ...
1
vote
0answers
14 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 ...
1
vote
0answers
34 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 ...
0
votes
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 ...
0
votes
1answer
24 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 ...
3
votes
1answer
64 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 ...
1
vote
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
votes
2answers
75 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 ...
0
votes
1answer
56 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 +...
4
votes
1answer
35 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 ...
1
vote
0answers
25 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
vote
1answer
59 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
votes
1answer
25 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 ...
1
vote
0answers
27 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%, ...
1
vote
0answers
21 views
MacOS Boot Error
I hope I am able to explain the problem accurately and with sufficient detail.
The problem started with the flashing folder at boot up. I used the Command + r option to get into recovery mode.
...
3
votes
1answer
37 views
MacBook Air 7.1 (early 2015) freezes for five to ten minutes after login
Recently, my MacBook Air 7.1 (early 2015) has been very slow on startup. That is, the system boots quickly, and then I'm able to login, and the desktop begins to load. Initially, I have control and ...
0
votes
1answer
37 views
mac won't start after “sudo chown -R $(whoami) $(brew --prefix)/*” command
I tried to install a program and it alwaysed lacked permission on /usr/local.
I tried sudo chown -R $USER /usr/local but then found out that doesn't work anymore with High Sierra.
So I tried sudo ...
0
votes
0answers
31 views
How to create bootable installation media for Mojave without erasing the target drive
I would like to use my existing external ssd (500GB) as a bootable Mojave installation disk. But I don't want to erase the contents or format the drive.
This page has the general instructions https://...
1
vote
1answer
55 views
Stuck during clean install on a new SSD on a late 2009 iMac
I hope you might be able to help me out since I am completely stuck in my attempt to perform a clean install of High Sierra on a late 2009 iMac (model number A1311 – does not have Internet recovery) ...
0
votes
1answer
66 views
When does software take over firmware during boot in Macs?
This is for me the $1 million question I’ve never had a certain answer about.
I learnt long ago that in newer 32bit-64bit PCs the initial phase of the startup process is controlled by firmware and is ...
0
votes
0answers
30 views
Macbook Pro stuck after I enter user password, screen starts to switching off and on while loading is stuck
Yesterday everything was working fine. Today, when I turned on macbook, enter the password as usual and in 60-75% of loading bar - screen starts to turn off and on. When screen turned on again, there'...
2
votes
0answers
34 views
Dual boot bootloader problems - Mac & Linux
I recently stumbled upon a problem with default MacOS bootloader.
The scenario is next: My Macbook pro 2012 only has one 256 GB drive from where I specified 70 GB's of space to be used as Ext4 ...
0
votes
1answer
39 views
NVRAM Showing Questionable Payload Variables… Can anyone verify if this is normal?
I used the terminal command in macOS 'nvram -xp':
student:~ admin$ nvram -xp
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www....
1
vote
1answer
33 views
How to go to boot options?
I have a MacBookPro Retina 13" early 2015 and I can not enter the boot options.
The Device is running OS X El Capitan.
I have tried the following things with no luck:
Attempt 1 - Hold the Option
...
0
votes
0answers
64 views
Error “No bootable device — insert boot disk and press any key” after trying to boot into Windows
today I was going to boot into my Windows partition and went into System Preferences and chose to boot into Windows and pressed Restart.
After I did this all I got was "No bootable device -- insert ...
0
votes
1answer
27 views
Cannot boot into Ubuntu installed on an external SSD after installing Windows with Boot Camp
I have a MacBook Pro running macOS Mojave and an external SSD with Ubuntu installed on it. The way I swapped between macOS and Ubuntu was by pressing the Option/Alt during boot to choose between ...
1
vote
3answers
66 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 ...
0
votes
0answers
31 views
Can't login to mac after using single user mode for a password change
Was working on a friend's Mac and required a password she couldn't remember. Used single user mode as a start up option and changed the password and rebooted but then was unable to login. It lets you ...
0
votes
0answers
19 views
External hard drive is not recognized by MacOS after trying to install something on it
Can someone help me with this? (without having to format it)
Here's the table
start size index contents
0 5859790848
MacBook-Pro-de-Elias:~ ///$ sudo gpt show /dev/...
1
vote
1answer
43 views
Glitch or bad design during booting on Mojave?
After enabling FileVault with recent T2 firmware patch the loading bar looks weird like its missing pre-cached image:
I replaced default Mojave.heic with a test image and gray "transparent" area kept ...
0
votes
0answers
42 views
How do I use Single User Mode to fix blank internal drives on Late 2012 iMac when root is USB Mojave
I am having a lot of problems with my Late 2012 27" iMac not booting (and not letting me install, run diagnostics tests etc)...
Ok... I'll try and keep this short as possible...
Late 2012 3.4Ghz 8MB ...
1
vote
1answer
47 views
Are there any risk of bricking the macbook by cloning to a partition?
I'm currently using a mac with 3 bootable partitions (multiboot). MacOS, Ubuntu and Arch-Linux.
I can switch between the operating systems using rEFInd
I mostly only use Arch-Linux but only gave it ...
0
votes
0answers
32 views
Boot a Mac with WiFi turned off [duplicate]
Is there any way to boot a Mac with WiFi turned off completely, until manually turned on again?
(And to be precise - it should be turned off completely and not just disconnected from a network.)
The ...
0
votes
0answers
17 views
Hard drive won't mount (not visible) when connected to internal SATA ribbon
I have an old macbook pro (I think from 2013, but I am not sure), and the hard drive (WD blue 750gb WD7500BPVX, something like this) is broken (I think). Basically I can see it from the disk utility ...
2
votes
1answer
60 views
MacBook 2,1 OS X 10.6.8 - Boot screen loop
My MacBook2,1 is stuck in a loop on boot screen. It flashes from ?Folder, to an also flashing net recovery globe, and every so often an Apple logo for a few seconds, but never actually boots into the ...
2
votes
1answer
172 views
Lost my APFS partition after using EaseUS partition manager on Bootcamp
I used macOS mojave(APFS partition) and Windows10(Bootcamp). And I tried to expand Bootcamp partition with moving Windows OEM partition by EaseUS partition master in windows.
After this, I can’t find ...
0
votes
1answer
29 views
Macbook restarts when logging in
My Macbook Pro (Mid-2015, Mojave) restarts after I type my password to log in.
The progress bar fills to about three-quarters before this happens.
I have tried:
Resetting PRAM
Resetting SMC
...
2
votes
1answer
167 views
MacBook Pro stuck on GRUB minimal Bash at startup
I had a dual boot Linux Mint 19 and macOS on my MacBookPro11,2. Since the CPU was overheating with Linux, I decided today to delete the Linux partition.
Little problem, when I start my MacBook Pro now,...
3
votes
1answer
121 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 ...
0
votes
0answers
39 views
Cannot boot into any OS, Recovery or Safemode. (Macbook Pro 15 Ret Mid 2012)
My SSD was partitioned for Windows and macOS.
I use the Macbook almost exclusively for Windows 10.
Mid 2012 MBP Retina 15" 2.3Ghz 8GB.
I recently began having problems booting into Windows. The ...
1
vote
1answer
74 views
After deleting kali linux partition, macOS partition startup Volume type FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF [duplicate]
First of all I know this problem and similar problems have been solved before, but I had tried the solutions from the other posts and I didn’t have luck.
I know klanomath has a lot of experience and ...
0
votes
1answer
65 views
Bootable USB for Windows 7 isn’t showing up on MacBook Pro 12,2
I made a Windows 7 installation USB using Microsoft’s installation tool on my Windows PC. When I boot the Mac while holding Option. Only the Mac disk appears. The USB is NTFS. I checked if anything is ...
1
vote
1answer
64 views
(2010 Macbook on Sierra) White Screen of Death “Legacy Shim 2”
I am fairly confident this is not something that happens often, but I am open to be proven wrong. This is most likely a hardware issue, but I really hope it is not.
My mac starts up with a blank ...
1
vote
0answers
34 views
2018 Mac Mini - Won't boot when power applied
I work in an environment where power is turned off to the building nightly. On previous revisions of the Mac Mini, I was able to get them to automatically boot when power is applied (in the mornings) ...
0
votes
1answer
423 views
macOS Mojave on iMac won't boot into safe mode
My iMac (late 2015, 8/1TBSSD) has run happily for more than a year on High Sierra, and I just now upgraded the OS to Mojave. Now, the machine won't boot into safe mode or into Recovery. When I hold ...
3
votes
2answers
156 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 ...
6
votes
2answers
702 views
Mac Pro install disk keeps ejecting itself
I am not that savvy with Macintosh computers so I can't figure out why the install disk keeps ejecting when I attempt to boot from disk by holding down the "C" button or the option button.
It is not ...
1
vote
1answer
187 views
How to find out whether NVRAM was reset?
I was having some issues with my mac so I reset NVRAM by holding ⌘+⌥+P+R.
The problem is that this laptop does not chime when NVRAM is reset, so I'm not sure if NVRAM was indeed reset.
How can I ...
0
votes
1answer
146 views
13'' 2011 MacBook Air: Stuck at blank gray screen, no boot option working
I have a 13" 2011 MacBook Air A1369 stuck on a grey screen. When I startup I can hear the chime and the computer proceed to go to a blank gray screen immediately. The screen has no Apple logo or ...
