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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2017 4K iMac stuck in Boot Loop

I have a 2017 4K iMac that failed an in-place upgrade from High Sierra to Big Sur. It is currently in a boot loop, where the Apple logo will appear with a progress bar, the progress bar will proceed ...
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Boot login screen responsive only a second every minute

Description: Out of nowhere, the boot login/decryption screen started to become unresponsive. Fortunately, the screen is responsive for about a second every minute (or so). This way I can still type ...
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SMART status failing : do I need to replace hdd?

So, I just 'saved' an iMac A1312 (2009) that was about to be thrown away with a bunch of other computers, at the university where I work. Most of the time the computers that are thrown out are in ...
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Cannot mount √ - Data volume in Catalina

My mac mini 2012 suddenly couldn't boot this morning. It looks like the main volume (with everything) is unmounted, for some reason. When I try to mount it in Recovery Mode, I get a com.apple....
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Let's try to fix the "Sleep Wake failure in EFI -- Failure code:: 0xffffffff 0x0000001f"

I have had this well-known issue for a way too long time... Now it got unbearable and I'm hoping to find help here. The issue For those unfamiliar with it, here's the general description: Starting ...
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Is it possible to dual boot MacOS alongside another MacOS on Apple Silicon Macs? (Work and play)

Due to requirements from our secops team, the only way I'm allowed to use my laptop for non work purposes (gaming, personal projects, etc) is if I'm able to install a separate MacOS install alongside ...
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Booting into Windows 10 Installer from Mac Pro (2012)

I am trying to boot into the Windows 10 Installer (7 or 8 would work as well) on my 2012 Mac Pro using a USB drive. When holding the option key on startup, it recognizes the USB as bootable and lets ...
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Is there a way to copy content from a broken (no display) m1 macbook to another m1 macbook?

The broken MacBook is an M1, still turns on, but the display is broken so no visual. There are no external monitors to connect either. I don't wanna do any open-heart surgery on the broken MacBook ...
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Mac mini stuck in boot (progress bar full) after SSD Upgrade

I've done the following: created a time machine backup from a mac mini with a 1TB HDD (only used about 40GB). replaced the disk with a previously used, working SSD - Samsung EVO 850, 500GB. time ...
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2009 Mac with Upgraded GPU

Well I feel really silly. I had a stable running 10.13 with a metal supported gpu but I wanted to clone the drive as I move into Mojave. So I thought, oh I’ll start it up on an old hard drive running ...
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Recovery Mode Can't Install OS X Mavericks (Late 2009 iMac)

I have a wiped iMac (27-Inch "Core i5" 2.66 - Late 2009) that boots into recovery mode. When I try to install OS X (Mavericks) It says "An error occurred while preparing the ...
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2019 Macbook Pro boots straight to internet recovery

I have a 2019 Macbook pro that had a swollen battery. The battery was causing the laptop to crash randomly, but I could boot into it only if I fully drained the battery first, after which it would ...
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I can't boot up disk options when I startup my Mac

I recently installed Asahi Linux, and for a few months now I've had no issue with it. Now, however, my computer decided to boot me up into Asahi Linux when I started charging it after it died. Usually,...
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Boot process check for a suspicious terminal window on start up - macOS Monterey

macOS Monterey version 12.3.1 (21E258) shows a suspicious terminal window on start up. The title of the window is "Window". See at second 3 here https://youtu.be/ajRt_2cU6OQ?t=3 Still ...
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Macbook Pro Can't Boot From macOS Monterey of External SSD

I have recently decide to install dual OS (macOS and Windows 10) on this newly bought SSD to run both Mac and Windows on my Macbook Pro 2017. What I did was, Disk Partition on Windows. Got three ...
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Monterey - repeated kernel panics : watchdog timeout: no successful checkins from dfrd in 180 seconds

My MacBook Pro (13-inch, 2019) is experiencing repeated kernel panics with the message below: panic(cpu 1 caller 0xfffffff02856d6ec): userspace watchdog timeout: no successful checkins from dfrd in ...
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How to get into Recovery mode in MacOS 11.4 **Remotely**(M1)

I need to reboot into recovery mode on a remote Mac machine (M1, 11.4). I found that there are 2 ways to do it: One - By pressing some buttons at startup. Two - By setting the nvram like so: sudo ...
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I installed Xubuntu without installing rEFind. Is it safe to remove the linux partition at this point?

This is continuation from my previous question "I removed the rEFInd and rEFIt boot managers and now I've lost Windows Bootcamp from the Mac Startup Manager", where I now can boot Windows ...
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Fixing mac bootcamp boot to windows after formating a disk

I have an old iMac (21.5-inch, Mid 2011) and I wanted to give it a new life with a new SSD. I've installed both Mac & Windows on the SSD and life was good. Then I decided to format the old HDD to ...
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3 votes
1 answer
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How do I enable USB boot after deleting my recovery partition?

I did a rather careless thing while in disk recovery (I was wiping a MacBook Pro 2018 for re-use) and I accidentally deleted the root volume, which means everything. Because I don't have a recovery ...
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I removed the rEFInd and rEFIt boot managers and now I've lost Windows Bootcamp from the Mac Startup Manager

I installed rEFInd boot manager because I wanted to add a linux partition. I already had bootcamp set up. However, after installing rEFInd, my Mac UI scaling was too large and slightly blurred. I have ...
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My M1 MBP doesn't let me boot into my Ubuntu Installer USB. I tried rEFInd but I couldn't mount my EFI drive

I am trying to install Ubuntu on my 64GB USB. I used Unetbootin to install an aarch64 Ubuntu 20.10 ISO to my USB. When I restart into Startup Options, I only see "Options" and "...
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Unable to boot MacBook Pro 15" mid-2014 (Big Sur) after update

I have a MacBook Pro 15" mid-2014 with Big Sur on it. I tried to update the operating system to the latest version (11.6.5) using System Update. During the update process it restarted itself but ...
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Startup Disk Got Missing

Firstly, I really apologize for what I've been doing so far on my MacBook Pro 2015. I was trying to install a Kali dual boot on my Mac, and this is what I did before my MacBook didn't boot up my ...
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Install macOS Monterey.app does not appear to be a valid OS installer application

I tried to follow the existing guides explaining how to make a bootable install USB drive for OSX Monterey. However after downloading Monterey, formatting the USB, and running the following as root: /...
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How to use a specific keyboard layout upon boot?

I've installed DosDude's patches to get Catalina running on my Mac Pro 4,1. However, I'm a Dvorak typist, and now I find I'm booting Catalina in "Canadian English" layout instead of Dvorak. ...
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Sometimes my MacBook Pro wont boot at all

I have a 2015 15" MacBook Pro with specs below Lately my Mac wont wakeup from sleep and I have to force shutdown it. When I turn on back my Mac it won't boot (Keyboard and Screen didn't turn on ...
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Possible to edit macOS Installer options through Terminal?

I have an Apple computer stuck on the latest OS (Monterey) update with just the progress bar and Apple logo. The installer logger shows the following errors: MacBook-Pro osinstallersetup(447): IFJS: ...
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Boot from USB (Kali Linux, M1 Silicon)

I created a live USB on a Sandisk 32gb ultra dual drive luxe using kali linux live iso and balena etcher software (I also tried dd) but the USB won't show up in the boot drive selector Startup menu ...
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2017 iMac can't boot

Does anyone know how to fix a completely wiped 2017 iMac? like you can't boot into recovery mode, can't reset NVRAM, can't do Internet Recovery Mode, can't boot into Safe Mode or Single-user Mode, can'...
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1 answer
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MBP running 10.15.7 shuts off on boot/corrupted boot filesystem

I've been trying to fix this issue for the past week or so. Some sort of boot issue seems to occur once a year on this machine, and I will be upgrading but need this one to hold on a little longer. ...
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2 votes
2 answers
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Macbook Pro 2010 white screen

When I start my MacBook, I have an empty folder with a question mark. If I start Internet Recovery, I get stuck at a white or gray screen. I created a boot USB stick with El Capitan and I received a ...
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Troubleshooting: iMac SSD appears then disappears

I have a 27" iMac (18,3) that originally came with a 2TB Fusion drive. Last week, the iMac started showing signs of HDD failure so I swapped out the main drive with an SSD from OWC. After ...
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Rename EFI boot entries (MacBook Air)

I can't figure out how to rename boot entries on a MacBook Air 2012, i.e. those that appear when holding alt during boot. The problem was initially that my EFI Ubuntu installation could only be booted ...
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Is there any way to fix my iMac which can't boot?

I have an iMac 27' bought in about 2014 (can't see the detail model because I can't turn it on). Due to covid-19, I left my iMac at my friend's house for over 6 months. The iMac was never booted ...
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MacBook Early 2015 suddenly doesn't startup anymore

MacBook Early 2015 suddenly doesn't startup anymore and hangs on loading screen. I used Diagnostics using D on startup, no problems. tried everything i know Nvram reset and SMC reset. tried booting to ...
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Update to Monterey 12.3 fails: A snapshot is currently set to boot that is not the currently booted snapshot

I have restarted the computer several times, but no help. The Disk Utility looks like this I once disabled the SIP following the guide in this Reddit thread, but re-enabled it afterward. And by ...
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1 answer
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Kali boot USB drive not showing up in boot menu

I am trying to boot Kali Linux from my late 2020 M1 MacBook Air with macOS Monterey. I tried to boot an x64 Kali image on an M1 system, but encountered the following problem. I used both Balena Etcher ...
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1 vote
1 answer
321 views

Startup Manager doesn't show bootable USB drive so as to install Linux

I'm trying to install Linux Mint LMDE 4 on an Intel iMac, OSX 10.6.8. The iMac has a 2 GHz Core 2 Duo with 1 GB of 667 MHz DDR2 RAM. The iMac doesn't recognize the USB drive when I plug it in and ...
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1 vote
1 answer
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iMac displaying abnormal picture shortly after powering on

iMac 27" - Late 2012 Model# A1419 Customer said they had the motherboard previously swapped out at another repair shop. Displays abnormal picture with lines running vertically and horizontally. ...
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1 answer
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2014 MBP No More Operating System / Boot usb not Detected

I have a mid-2014 MBP that I tried to downgrade but unfortunately ended up wiping out everything in the hard disk. Once it restarted, it doesn’t startup anymore and only the long press on [Option] ...
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1 vote
1 answer
58 views

Virtual Mac boots in verbose mode -- why?

Some time back, I used Parallels Desktop on a Mac running macOS Catalina (10.15) as a host system to create a virtual machine running OS X Sierra (10.13). Everything ran fine, if a bit slow. Then I ...
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MacBook Pro will not boot

When I turned on the Mac I get three tones, a circle image with diagonal line and wont boot. I restarted it in safe mode and got a text msg. For a couple of seconda, then disappeared, saying Panic 0 ...
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Removed a 50GB Linux Partition with Disk Utility and can't boot into macOS anymore

For a few years, I've had Linux Mint installed on a 50GB partition on my 2015 MacBook Pro. Today, I decided to remove the installation (I needed the extra 50GB and wasn't using Linux Mint anyway) and ...
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2 answers
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How can I set a scheduled boot for a MacBook running Windows?

I have a MacBook Air running OSX Big Sur along with a Boot Camp installation of Windows 10. If I boot into OSX and go to System Preferences -> Battery -> Schedule, I can set a time each day for ...
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1 vote
2 answers
200 views

Can Apple Silicon-based Mac boot from *unauthorized* external drive?

Can one boot M1 MacBook from a unauthorized bootable external drive: i.e. the external drive that was prepared on some other Mac, and the user not having admin password of the MacBook he is trying to ...
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Booting new version of OS X from old bootcamp windows version

I’ve got an old Macbook Pro 2012 with macOS Catalina on it. There is an old Win 7 installation with Bootcamp 4.1. I booted into it after a couple of years and now I can’t boot macOS. Pressing “Restart ...
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Macbook Pro 14 Won't Boot

I have a 2017 Macbook Pro 14 (model A1708). Whenever I attempt to boot, the screen turns on, and nothing else happens. I can access the Apple boot menu, but I got the same result when I tried booting ...
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Windows 7 on MacBook Pro installed successfully but restarts with a white screen

I have a MacBook Pro Mid-2009. Unfortunately, I erased my internal drive which led me to OS X Utilities only. When i clicked on reinstall OS X, it asked me to sign into my Apple ID. But it ended with ...
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My MacBook Pro always reboots at night after I put it in Sleep mode

Here are some of the messages: Attempting to forcibly halt cpu 0 cpu 0 failed to halt with error -5: halt not supported for this configuration Debugger synchronization timed out; waited 240000 ...
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