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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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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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1answer
309 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 ...
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1answer
22 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 ...
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13 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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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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13 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
34 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
38 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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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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15 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 ...
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27 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
57 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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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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42 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 ...
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2answers
107 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 ...
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2answers
21 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 ...
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28 views

Is there a way to power up a 2017 MacBook Pro (non Touch Bar) with a bad keyboard?

A friend of mine has asked me to take a look and see if I can bring their 2017 MacBook Pro (13", non Touch Bar) back to life. Apparently the cause of death was that a glass of wine was spilled on the ...
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24 views

No display during boot, then powers off

Backstory: I purchased a late 2014 Mini about a year ago and attempted to setup bootcamp with Windows 10. Following numerous failed attempts I made an appointment with a genius bar. After several ...
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1answer
71 views

Mac asking for username and password on starting up

I am running MacOS High Sierra on a Macbook air and this is the screen that usually comes up on booting. The mac starts up after typing the right password. From yesterday after restarting, after ...
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1answer
38 views

How can I boot back to Mojave from Boot Camp 6 with password-locked boot manager?

The situation is as follows: I have a MacBook Air 13" (early 2015), which was corporate but the employer allowed me to buy it when I was changing jobs. I have installed Windows 10 from an official ...
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1answer
42 views

Macbook pro (mid-2012) startup chime delayed (slow booting) after HDD to SSD conversion

I recently upgraded HDD to SSD on my mid-2012 macbook pro. After the SSD upgrade, the startup chime is delayed, causing slow booting of my mac. Any potential pointers ?
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Question Folder but no Startup Options

I came home to my Mac Book Pro (late 2009) showing me the blinking question mark folder. I followed all the instructions available online (Reset NVRAM, SMC) but neither boot screen (pressing Alt ...
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1answer
43 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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2answers
47 views

Can’t Boot My 10.14.3 Mac Pro Into Internal Recovery Mode

< 3.5 GHz, 6-Core Mac Pro (MacPro6,1) with 16GB RAM and D700 GPUs, running macOS 10.14.3 > Greetings, folks! I am baffled that I cannot boot my Mac into Recovery Mode after a clean install of 10....
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45 views

Reinstall macOS after having Linux

I installed Ubuntu on a 2010 Macbook, just to try it out. I now want to go back to either Sierra o High Sierra. I created Install UBS sticks and I tried to boot from them by holding the Option Key. ...
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1answer
43 views

How to use a kext that has just the info.plist changed without codesign or SIP disabled?

Similar to How do I edit an info.plist file inside of a kext file? There is a need to change how a kext works. (Specifically /System/Library/Extensions/AMD6000Controller.kext/Contents/Info.plist ...
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1answer
34 views

Can I install dual-boot OS on the external USB drive?

I have a MF839 MacBook with Mojave and I want to install Linux as my dual-boot system on the external USB drive. I have one USB with 8GB and one with 64GB. On 8GB I will burn my .iso file with Debian-...
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0answers
43 views

Adding functionality to macOS pre-boot process

Is anyone familiar with adding functionality to the macOS pre-boot process? I'm trying to supplement FileVault's functionality so that it can integrate with a user directory service, which isn't ...
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0answers
11 views

Macbook Pro (encrypted disk) hangs during login after some “low hdd space near-crash”

My macbook almost crashed when it was low on HDD space. I emptied about 10% of HDD, but still there were some glitches (some apps couldn't start up and so on), so I restarted the laptop. Restart didn'...
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1answer
34 views

Creating a bootable USB

I am trying to restore a dead windows machine, all I have access to currently is an old mac. I am trying to accomplish this by downloading the Win 10 1809 iso and creating a bootable USB stick with it....
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25 views

Can't reboot on external SSD with Bootcamp

a few months ago I bought a new Mac, since this machines are so pricy, I ended up buy a basic model with a small SSD and only 8GB of RAM, for this reason I have been trying to avoid running Windows ...
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1answer
30 views

What should I do about outdated BootCache playlists?

In /private/var/db/BootCaches there are old 'bootcache playlists' (not clear what these exactly are as they also have some sort of user component apparently) for Coriolis Systems (which in the past ...
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1answer
67 views

I'm Unable to Boot into Mac OS Partition, partition type FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF [duplicate]

I've seen similar answered questions like this. I'm unable to boot into my MacOS partition. Long story short, I had Windows BootCamp, removed it and then later installed Ubuntu Linux, then tried to ...
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1answer
93 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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1answer
25 views

iCloud Disassociation for a Mac Computer

I had a Mid-2012 MacBook Pro that recently stopped booting. I narrowed this down based on troubleshooting of the boot device to likely the SATA/hard drive connector/cable no longer working for ...
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what are the EFI vars that need to be set for the screen to boot up to black instead of gray?

you know how some macs boot gray with grayer apple logo and newer ones boot up black with apple logo? that's what I'm talking about I don't have access to a macOS partition and I don't even remember ...
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142 views

Mac OS running slow after Mojave install and disk appears to be corrupt

I currently have upgrade OS Mojave on my laptop, imac at home and imac at work. Don't ask me why I did all at once, other than not thinking straight. After the install performance has dropped on all ...
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1answer
36 views

Repeated MacBook Pro 2012 HDD Cable Failures

Two weeks ago, a friend's mid-2012 MacBook Pro gave the dreaded question mark folder upon attempting to wake from sleep. I pulled the drive and checked it (backed up, SMART status passed, 70+ MBps ...
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1answer
121 views

Update screwing with encrypted disk or keep using windows boot?

On my 2011 macbook air i have high sierra installed. It attempted and at some point completed an update security update 2010-001 to version 10.13.6 (not sure if i had automatic updates on or not). ...
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0answers
14 views

Booting into macOS installer; possibly stuck

I'm trying to boot into a macOS Sierra installer that I made today. For the last about 20% of the progress bar, it was booting extremely slowly. Now, the progress bar has been stuck for the last ~20 ...
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0answers
530 views

After replaced SSD (970 EVO) on MBP mid 2015, Mac didn't start after a workday but after changed back to orig SSD?

I have an Macbook Pro Mid 2015 with an 512GB SSD. Because I alway ran out of storage I wanted to upgrade to an Samsung 970 EVO Plus 1TB. For reasons I don't know I couldn't clone the system to that ...
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0answers
16 views

Mac will not boot and have tried repair and entering terminal

CANNOT access recovery not disk repair. I literally moved it about 20' to new office and now when I turn it on it starts up and makes it about a quarter of the way during/after apple logo and then ...
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1answer
34 views

Macbook turns off after a minute – not in safe mode, but in all recovery modes

Problem My friend's Macbook Pro Retina Early 2015 turns off abruptly to a black screen (as far as I can tell without logs) after booting. Takes ca. 1 minute. The last thing he remembers doing ...
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Macbook Pro mid-2015 Mojave: Screen turns black for a while after logging in

I don't know is it okay or not but after I typed my password and the apple logo appears, suddenly my screen turn black for a while and after a few seconds it goes back to finish its loading bar ...
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0answers
21 views

Installed a new SSD into MackBook. Flashing folder icon shown at startup

A1342 New SSD. Flashing folder icon on start up, no key commands working I’ve just fitted my MacBook A1342 with a 850 Evo SSD. The recovery mode keys and others will not work. I have managed to rest ...
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1answer
207 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 ...
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31 views

Dual CPU Mac Pro 4,1->5,1 won't boot with more than one RAM stick per processor

I was working on my dual CPU Mac Pro 4,1 (upgraded to 5,1), having removed the CPU tray to access the board behind it, and subsequently the machine was non-bootable. Following the process of building ...
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0answers
14 views

MBP 2009 mid Prohibited sign at boot and cant boot into usb ether

I Got a MBP 2009 still with DVD I installed High sierra 10.13 with the (not officially supprted but MacOS Patcher made it possible) And encrypted SSD which my Company's policy demand you to do that if ...
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1answer
58 views

Disable Apple FaceTime Camera kernel module

One day my FaceTime Camera stopped working, so I decided to reboot my MacBook. After waiting hours, MacOS didn't complete the boot process. In verbose mode ⌘+V, I can see initialization hangs with ...
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1answer
87 views

MacBook Pro won't boot from USB installer or go into recovery. Tried everything

Hi I have a MacBook Pro (15-inch, Mid 2012) that won't boot using any method. Around 6 months ago, the mac started making loud scratching sounds, but they stopped after a day or so. However, a few ...