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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21 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%, ...
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0answers
19 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. ...
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1answer
33 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 ...
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1answer
30 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 ...
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21 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://...
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1answer
44 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) ...
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1answer
65 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 ...
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22 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'...
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25 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 ...
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1answer
32 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....
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0answers
29 views

MacBook Pro: Lengthy boot time

I have a 2018 Macbook Pro 2018 (Core i9) which takes around 15 minutes of time to boot up. I tried SMC and NVRAM reset. While I boot up, I see repeating massages like: interface link is not up, do ...
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1answer
31 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 ...
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46 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 ...
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1answer
21 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 ...
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2answers
41 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 ...
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0answers
28 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 ...
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0answers
18 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/...
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1answer
35 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 ...
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0answers
29 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 ...
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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 ...
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0answers
30 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 ...
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0answers
16 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 ...
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1answer
42 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 ...
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1answer
148 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 ...
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1answer
19 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
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1answer
115 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
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1answer
85 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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0answers
34 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 ...
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1answer
68 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 ...
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1answer
49 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 ...
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1answer
42 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 ...
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0answers
28 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
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1answer
235 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
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2answers
118 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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2answers
615 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 ...
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1answer
116 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 ...
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1answer
105 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 ...
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4answers
1k views

2018 MacBook Pro won't let me install macOS High Sierra 10.13 from USB installer

I've got a 2018 MacBook Pro (Model ID : MacBook 15,1) that shipped with macOS Mojave 10.14, that I need to downgrade to run macOS High Sierra 10.13. I've tried reformatting the main drive using Disk ...
1
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1answer
34 views

MacBook Pro 8,2 (Early 2011, 15'' Unibody 2.3 GHz i7) - OS crashes randomly, after log in screen goes all white

I have a Macbook Pro, randomly started running into issues when logging in after start up. Occasionally will get the desktop to load but shortly thereafter the OS crashes leading to a screen with ...
2
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0answers
19 views

How to access ASL (Apple System Log) from macOS Recovery?

I have trouble booting the MacOS system. It's in constant loop. I don't know how can I access the logs from MacOS Recovery so I can troubleshoot it. Any suggestion? Can I do SSH to the system?
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0answers
16 views

Macbook Air 13 - Stuck mid-bar at login, after reinstalling system stuck on apple logo

My Macbook Air 13 has crashed today. I've been playing some games on it and the screen suddenly got stuck. After waiting for about 15 minutes I turned it off the hard way (power button hold), ...
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0answers
22 views

Set default boot disk to USB on macmini with T2 chip

I need to setup boot always from USB stick. I can boot it from USB by pressing Alt and selecting specific source. Buy how to do it permanently? Is is possible?
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1answer
38 views

How do I mount an SSD I got from an old Macbook?

I ripped a perfectly fine SSD out of a Macbook with a broken display. So far, all my attempts to access the file system on the SSD have failed. I've tried to put in a nearly identical Macbook. This ...
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1answer
504 views

How to delete macOS Installer boot

I tried to install a macOS High Sierra update, but I got the error "An error occurred installing macOS" and thus I decided to erase the Installer.app and dmg on my drive. Now every time I close my Mac ...
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0answers
24 views

Older Mac (2012) Fails to Boot, any ideas?

Guys I'm running out of steam here... how do I copy files from a hard drive in recovery mode to an external hard drive on an older mac. First few things I did: boot into recovery mode and run the ...
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0answers
20 views

Moved home-folder to external drive - after booting up Apps sometimes won't load

Bid on an 2018 Mac Mini on Ebay, when I realized that this impulse buy is an error (128GB internal drive) it was already too late. Solved that problem by moving my Home-Folder to an external ...
2
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0answers
45 views

Replaced SSD won't boot

I have cloned the HDD from an old MBP (Early 2011) to a Kingston A400 SSD. When booting from USB it all works fine, however once installed internally when booting it shows a no entry sign 🚫 (I assume ...
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1answer
165 views

MacBook Pro 2015 - New SSD, can't install macOS

I installed a 500GB Samsung 970 Evo Plus NVMe M.2 into my MacBook Pro 13" 2015 (128GB). I followed instructions in a youtube video. (Boot-Stick created, case opened, battery disconnected, SSD removed,...
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0answers
33 views

how to stop krisp.ai app from starting on boot

The Krisp app (a noise filter for skype calls) starts automatically on boot, and even if I remove it from the list of startup items, I keep finding it there. This is annoying and intrusive. I like ...
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0answers
126 views

iMac macOS High Sierra 10.13.6 white/grey screen and progress bar

I no longer have access to my iMac since 2019-03-26, the last date that it worked normally. I restarted my iMac on 2019-03-26 and since then it does not want to display the desktop anymore. It shows ...