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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2answers
203 views

Is 2017 MacBook Air SSD compatible with mid 2013 MacBook Air 11"?

I need to change the SSD of my MacBook Air 11" mid 2013 and I was wondering if the one of a newer MacBook Air 2017 would be compatible. I researched online and I think that the ports remain the same (...
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60 views

Macbook Air crashed and now won't boot, stuck at Apple logo with loading bar. Disk utility can't unmount the drive to repair

I have a Macbook Air that had what I think was a kernel panic the other day. What I have been told is that while the user was working, it crashed to a black screen with some info on it and then the ...
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1answer
223 views

APFS, two data volumes on a single OS partition for dual booting

I'd like to be able to switch between two Data volumes on the same macOS installed partition. My thinking is that I could have one data volume for home and one for work. This would, essentially, ...
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703 views

How to play audio in Safe Boot?

I am having an issue recently which causes my MacBook Pro 2015, 15", to spontaneously (and randomly?) shut down. These shut downs do not happen in Recovery Mode or Safe Boot. Temporarily, before I ...
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0answers
32 views

how to reduce Normal Boot's graphical performance (so that it copies Safe Boot's)?

I am having an issue recently which causes my MacBook Pro 2015, 15", to spontaneously (and randomly?) shut down. These shut downs do not happen in Recovery Mode or Safe Boot. Here is my MacBook ...
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1answer
243 views

What causes my Macbook to spontaneously shut down?

Out of the blue today, my Macbook Pro 2015 15", running macOS Catalina 10.15.2, shut down while I was using it. Since then, for the past half hour or so, I haven't been able to keep it on for longer ...
2
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1answer
241 views

How to make a bootable partition from scratch?

What I want to achieve is to make a new bootable partition on my MacBook's SSD, so it should be possible to press Option key on startup and choose this partition to boot from. Why do I need that? I ...
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0answers
30 views

HOw to fix sleep / hibernate issue on MacBook Pro early 2011?

I have a rather old early 2011 MacBook pro that I keep due to ports galore on it. The computer runs generally fine, but I am having issues with wake from sleep/hibernate. I have FileVault turned on. ...
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1answer
131 views

Boot menu shows non-existent boot drives [duplicate]

I used to run a Boot Camp partition on my Macbook Air (Early 2015, Catalina). When I didn't need it anymore I deleted the partition using Disk Utility. However, I noticed that when I boot up my ...
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2answers
124 views

Snow Leopard Clean Install

I have an iMac from 2010 and the Snow Leopard DVD and I am trying to do a clean install of Snow Leopard on it. Then, if I use the Install Snow Leopard option from the DVD, when it restarts it hangs on ...
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1answer
118 views

Cannot boot into Recovery

What I've done Disable T2 Security Boot In Catalina Add a APFS Volume mac2 Install Mojave on Volume mac2 from an external drive (Install security update, copy files and etc.) Remove Macintosh HD and ...
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0answers
75 views

Keyboard / touchpad not working on startup

I dual boot MacOS and Ubuntu on a Macbook Pro and used to be able to switch between the two by holding the Option button on startup. Recently this has stopped working; the keyboard and touchpad are ...
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1answer
57 views

MacBook Pro 2009 doesn't boot without charger

I have bought a used MacBook Pro 2009 from eBay. I have charged the battery to 100% (worked fine), and booted it. Everything worked, except that I can't boot when on battery. The battery itself is ...
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1answer
70 views

Logic board replacement or repair (for booting issue)?

I have a 2012 MacBook Pro 13 inch non-retina model . The issue was ,from past one year I used to get service battery message but I still kept using without worrying about it. The OS would boot ...
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3answers
266 views

How do I prep a, temporary, root login before editing sudoers?

I want to alter my sudo capabilities on my mac, to avoid password prompts on starting postgres among other things. I'm reading Michael Lucas' Sudo Mastery and generally have an OK idea on how to ...
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1answer
79 views

Script to run Adobe Update Remote Manager as Launch Daemon at Boot without MDM

Scenario: I need to figure out how to run the /usr/local/bin/RemoteUpdateManager at DeepFreeze maintenance cycle. During this maintenance cycle, the computers will restart to the login screen and ...
2
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0answers
40 views

Download failed in recovery mode, stuck with no OS on my Mac

Recently after upgrading to Catalina, my MacBook Pro has become really slow, so I thought it might be the system’s problem, so I decided to reinstall the original system that comes with the Mac (El ...
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0answers
22 views

MacBook Pro 2017 has problems when live booting from usb into parrot linux distro

I used Balena Etcher software to flash my usb with the image / iso of parrot linux distro the security edition. the live booting went fine but when it was all booted up I could not move mouse or do ...
3
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2answers
955 views

Turning off Apple hardware checks on startup

Since I stay on top of possible hardware errors using utilities, I don't want to allow my Mac to boot up and go through the checks each time. How do I skip over this process each time the computer ...
0
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1answer
76 views

Mac Pro early 2008 doesn't boot anymore

I got a Mac Pro early 2008 2x 2.8 quad-core for 12 years now. A few weeks ago, it stopped booting after 5 seconds. I restarted it and it was ok. But the problem came more and more often the next days, ...
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1answer
83 views

Is it safe to install Sierra with Apple Store blocked?

I have tried to install El Capitan to the Mid 2011 İMac with 10.7.2 (Or maybe 10.7.5) and then it gave me do not cross icon at boot and it is useless now. I downloaded install os dmg file to my own ...
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0answers
236 views

MacBook 15 Air won't boot after Catalina install

I installed Catalina from Mojave and went through the normal steps. I left it plugged in overnight to download and install, and when I checked it this morning the screen was black with a flashing gray ...
4
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2answers
2k views

macOS Catalina: execute bash script on boot with launchctl

Before updating to Catalina (10.15.1) my agent based on a bash script was working perfectly. I had set the agent in order to execute the bash script on boot. Here is the plist file: <?xml ...
2
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2answers
853 views

Creating a bootable Sierra image on Catalina

I received a MacBook7,1 a few days ago and wanted to use dosdude1's Catalina patcher to install it on my system. The first attempt actually yielded a result that constantly showcased weirdness. When I ...
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0answers
13 views

USB powered off after boot with Power Mac G4

I have a Power Mac G4 that I'm trying to boot off of a USB drive, I have gotten it to boot, but after it loads the kernel, the USB shuts down and the kernel panics because it cannot check the drive ...
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0answers
15 views

MacBook not booting up nor recognising bootable usb

I have this old macbook that I wanted to convert into a ubuntu server, however it didn't recognise my ubuntu server bootable usb which my newer MacBook Air did. After tying to use a 32 bit version and ...
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1answer
145 views

“Still waiting for root device” on a macbook pro mid 2009 with osx 10.11.6

Recently got myself a macbook and wanted to put linux on it. So I got myself a copy of ubuntu and refind and then: Installed refind in osx recovery mode and shut down. Booted up, selected my ...
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1answer
50 views

Boot from different startup disk AND in safe or recovery mode

I have two versions of Mac OS on my mac pro: Mojave, and 10.8.5. While using Mojave, I selected the startup disk to the other one via Preference Pane in order to access some old programs. To switch ...
4
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1answer
2k views

Mac stuck after trying to install updates, startup disk missing

I tried to install some updates on my Macbook Air. I received a notification asking if I wanted to restart the Macbook to install the updates, I accepted and restarted. When booting, the Apple logo ...
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1answer
50 views

Can't boot from USB or CD/DVD

I have an iMac 4,1 running OS X 10.5.8 that I want to install Lubuntu on. I have a USB drive and a DVD, both with the ISO burned to them, but I can't boot from either. They don't show up in Startup ...
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0answers
32 views

iOS Simulator is unable to boot up on my new Movaje MacBook Pro

I have a brand new MacBook Pro. I have Xcode 11.x installed. I have react-native-cli installed. why doesn't it want to obey me with react-native run-ios? --verbose is not giving me anything ...
3
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1answer
92 views

Is my battery in my iPhone faulty, or something more?

I have an iPhone 7. I had the battery replaced approx 6 months ago. I've noticed the battery life hasn't been overly great considering it's a new battery. Yesterday, my phone started turning off at ...
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0answers
34 views

Changing my administrator user's username has removed privileges, rebooting doesn't work [duplicate]

Like the title says, I was trying to change my username on my MacBook (running High Sierra Version 10.13.6), it removed my admin privileges so I do not have an Admin account. I tried rebooting in ...
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0answers
24 views

Will updating macOS from SL to El-Cap cause problems after disabling discrete GPU permanently from EFI (EFI mod and resistor removal)?

Currently on Macbook Pro 2011 17" 10.6.8 which was resurrected using the resistor-removal mod from "Realmacmods" as well as their EFI script. Would like to upgrade to El Capitan. Will i run into ...
10
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1answer
10k views

How can I triple boot MacOS Catalina , Ubuntu 18.04, and Windows 10

I currently use the mid-2014 MacBook Pro. I have read the similar questions asked but as I don't have much technical knowledge I thought I should create a new question. Device History I had ...
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0answers
25 views

External SSD drive, problem restarting Mojave

Here is a situation: iMac 5K from 2014 with Fusion drive, fusion drive is formatted as APFS, volume is called DATA and there is nothing on it. Firmware password is set. External USB drive (SSD) is ...
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0answers
67 views

Macbook Pro Mid 2015 booting to a black screen

I am using a Macbook Pro 15 inch Mid 2015. Running MacOS Catalina. I believe it is most up to date as of 11/7/2019, but I am unable to check. Issues started a few days ago when my machine started ...
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0answers
305 views

MacBook Pro 15" mid 2014 shutting down during boot (after failed macOS Catalina update)

I recently updated my Mac to macOS Catalina and it was going well until I installed the recent update and got stuck in the restarting installation process because there wasn't enough free space to ...
0
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1answer
30 views

How to create TOC style icon files to use with Option startup screen

Does anyone know how to modify the icon for an existing disk partition that shows up on the Option startup screen? If you hold down the Option key during power up, you will see an icon for each volume ...
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0answers
119 views

Mac won't boot after Mojave 10.14.6 update

here's hoping that someone may be able to help. I updated my Mac to Mojave 10.14.6, from 10.14.4, I think, and when I returned to the Mac, was greeted by the message that no disk could be found, and ...
2
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1answer
1k views

iMac stuck on 100 % progress bar

I have a serious problem with my 2017 iMac running macOS Catalina BETA. After a normal reboot the iMac loaded until the bar reached 100%. Then for hours nothing happens, it just stays at 100%. ...
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0answers
27 views

Unable to disable verbose boot on iMac

Every time I start my iMac up, it boots in verbose mode. This has been happening for some months now. I have tried clearing the NVRAM and SMC, but nothing helped. Interestingly, I upgraded from an ...
4
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2answers
257 views

External SSD no longer bootable

I have a Mac Mini (late 2014) with its stock internal drive and an external SSD via USB. The external drive has Sierra and this is what I always boot from. The internal is a clone of the external just ...
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0answers
31 views

Migrating OS 14 from External APFS drive to internal Sata HD

External drive is the system boot drive. Although I have attempted to restore the SATA drive from the external drive and the time machine backup, the internal HD only contains a textedit file titled "...
1
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1answer
974 views

Unable to Boot into Mac OS X after installing Ubuntu

First thing first, my MacBook Air partitioned into Ubuntu (30Gb) and OS X(91.2 Gb) was working fine until it started draining huge battery, lagging intensely and heating up. I figured out that this is ...
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2answers
237 views

Mac mini hangs on Apple logo after Mojave 10.14.6 Update 2

My mac mini (model Late 2012) worked fine until I installed the "Mojave 10.14.6 Update 2" security fix today. After the automatic reboot (required for the update), the boot process hangs after ...
0
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1answer
32 views

Early 2011 Macbook Pro boots, then shuts off

I have an Early 2011 Macbook Pro that shuts off shortly after it boots up. Essentially it'll turn on, the Apple logo will show and so will the load bar. However the load bar doesn't budge and the ...
2
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2answers
141 views

MacBook Pro displays Apple Logo and Prohibitory Symbol

My MacBook Pro 15" displays the Prohibitory Symbol on start-up. What can I do to fix it?
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2answers
573 views

Reboot directly from MacOS to Startup Manager? (Init command)

I have a strange setup (briefly, I have Windows 10 on an external SSD and I use a MacBook Pro as my main Mac these days in a dock that connects to an external monitor which has a hub - Samsung CJ79 34"...
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0answers
27 views

Cannot boot into MacOS after installing Ubuntu (dual boot)

I recently installed Ubuntu on my Mac and for some reason I cannot boot back into Mac OS anymore (I never could). Unfortunately, I have no solid idea about how I could have messed this up and quite ...

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