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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Broken MacBook boots grub

I had installed a Ubuntu partition on my Mac, but last night the keyboard broke, so I was trying to reinstall Mac OS from the recovery mode and accidentally wrongly deleted all the partitions my Mac ...
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37 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) ...
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1answer
760 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 ...
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4answers
2k 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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2answers
796 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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267 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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2answers
2k views

macbook pro stuck in boot loop - recovery mode and safe mode not working

I have a macbook pro 2015 (8gb ram, running macOS mojave) stuck in the loading screen with the apple logo and the loading bar 100% completed. I tried leaving it for long periods of time. Resetting ...
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1answer
432 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
386 views

Early 2013 MBP Retina 15 won't boot unless Thunderbolt -> Ethernet dongle plugged in

My early 2013 Macbook Pro Retina 15" started to freeze a few days ago. The only way to get it (sort of) working was by holding the power button down and forcing a reboot. After a few days of ...
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1answer
41 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
45 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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31 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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1answer
163 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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21 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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30 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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5answers
123k 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 ...
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1answer
1k 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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26 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
24 views

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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21 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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1answer
192 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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0answers
67 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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3answers
245k 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 ...
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1answer
204 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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77 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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2answers
4k 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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401 views

External hard drive APFS marked as read only, after repair does not mount at boot time

I have an external 2TB hard drive formatted with APFS connected to my 2017 iMac 27" running Mojave/10.14. Until yesterday, this external disk would be mounted during boot time and everything worked ...
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1answer
45 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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0answers
2k 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
582 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
29 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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0answers
53 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
46 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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1answer
176 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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0answers
39 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 ...
3
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2answers
23 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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2answers
317 views

macbook mid 2010 white 13.3" running high sierra has half chance to boot

I have "Macbook (13-inch, Mid 2010)" it has white plastic case with 4GB 1067MHz DDR3 RAM and NVIDIA Geforce 320M 256MB. Model Identifier: MacBook 7,1 Boot ROM Version: MB71.003F.B00.18022149 SMC ...
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2answers
1k views

Mac running macOS Mojave doesn't boot

I've updated to macOS Mojave weeks ago, and everything was working very well. However, yesterday my iMac (2014, I think?) didn't even boot, nor does it today. The verbose mode shows this (I know I ...
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1answer
1k 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
2k views

iMac 27'' mid-2011 stuck on startup (grey screen)

Okay, so I'm having the dreaded grey screen on my iMac - precisely : i'm having it doing a normal startup i'm having it trying to boot from recovery partition i'm having it trying to boot for ...
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2answers
16k views

How to make and use an USB stick with GParted that will boot on a Mac?

I want to create a USB stick with GParted on it that will be recognized by my Mac. Obviously, I want to create it on a Mac, also. This is not mentioned in the documentation here.
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1answer
269 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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1answer
173 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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3answers
65k 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 ...
2
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2answers
259 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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3answers
6k views

Mid-2010 Macbook Pro won't boot after trying to install macOS Sierra

After I ran the macOS Sierra installer to start installation, my 2010 Macbook Pro wouldn't start anymore. It would get to the grey startup screen, flash the Apple logo for a second, and then switch to ...
4
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4answers
27k views

Thin green lines on boot, then screen goes grey (late 2011 MBP – 8,2)?

Last night I was using my late 2011 MBP (higher res screen, dual Intel/AMD graphics), and the screen suddenly went black. I left it go for a minute - no change. I open and closed the lid – it ...
1
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1answer
80 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-...
7
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1answer
2k views

Is there any way to prevent a MacBook Air (2018) from powering up when the lid is open or an input device (keyboard or trackpad) is touched?

So, I am a happy (genuinely, not sarcastic!) owner of a new MacBook Air (2018). It works great! It’s running macOS 10.14.1 (Mojave). But it seems to do something that owners of 2016 to 2018 MacBook ...
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1answer
175 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....