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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MacBook Pro Early 2011 Clean Install

I have an early 2011 MacBook Pro 15" (Model A1286) that I have been trying to troubleshoot off and on for about 6 months. Original issue seemed to be a kernel panic where the graphics would pixelate ...
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1answer
17 views

Macintosh HD is not visible on boot but is can be detected using Recovery on an installation USB

I've transplanted the SSD drive between two identical MacBook Air's - both are 13" Early 2015 models - as one of them had died. Upon moving the SSD from the dead MacBook to the other one, booting the ...
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1answer
2k 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,...
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552 views

I can no longer boot into macOS after resizing my bootcamp partition in EaseUS

I tried to enlarge the bootcamp windows 10 partition by 17gb. I went to disk utility on my mac, resized the mac's partition to smaller leaving 17-18gb of free space, then booted up the windows in ...
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iMac 2008 Flashing Question Mark on Startup (Tried almost everything)

I recently purchased an iMac from a local Goodwill. After talking to Apple support I was able to find out that this is a 2008 all-in-one model. Additionally, I asked for help with the "flashing ...
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1answer
102 views

Avoid computer to show automatically password wizard option after time out

The issue Regularly, the following happens: A Mac computer, running mac OS 10.15.3 (19D76), with Filevault enabled, is turned on, If the user logs in immediately, everything is normal. Otherwise, ...
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22 views

What is the command line equivalent of PRAM reset?

My wired keyboard is starting to flake out and I'm not able to PRAM reset the machine at boot with the Option ⌥ + Command ⌘ + P + R sequence. I tried plugging in a Windows keyboard and use Alt + ...
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1answer
31 views

Login user - opposite to launchctl bootout user/id

How can I login user in programmatically way? I need something opposite to command launchctl bootout user/502 that logouts user with id=502. Does this way exist?
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5answers
9k views

High Sierra - Bootable USB - Can't make

I have a problem with making bootable USB. I'm getting this error: Macintosh:~ **$ sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/...
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1answer
23 views

Macbook Air 2013 won't boot up; Charging cable never turns green, always amber

I have a 2013 MacBook Air 13" (A1466), which all off a sudden wouldn't boot up. The charging LED on the cable was always green. I then attempted: Holding the power button down 10 secs SMC Reset ...
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3answers
20k views

How do I install MacOS Sierra DMG to Bootable USB?

I have MacBook Pro (Mid 2012) model, and I formatted the whole hard-drive to create partitions on 500GB HDD. So now I don't have any OS installed on MacBook and for booting I use Cmd+Opt+R and It ...
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How to boot from USB when no bootable drives show up?

I bought a 2012 iMac about 3 years and immediately upgraded to an SSD, but the read/write speads maxed out at about USB3 speeds, so I just booted it from USB the whole time. Fast-forward to about 6 ...
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Is there any way to prevent a MacBook Air (2019) from powering up when an input device (keyboard or trackpad) is touched or the lid is open?

While I know there is a hack to prevent MacBooks — 2016 and higher — from starting up when the lid is open, I would like to know if there is a similar hack to prevent a MacBook from powering up when ...
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Is there a command that can be used to restart a Mac directly into maintenance mode? [duplicate]

I tried init 1 on Catalina without success (neither Catalina nor Mojave have it). The normal way to do it is with key presses early in the power-up sequence, but that's tricky without a wired ...
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MacBook Pro 2015 won’t boot to Operating System. Constantly restarts at Apple logo screen

I have tried all the obvious commands at boot without success, including Safe Mode. Then booted into Single-User mode. Ran “fsck -fy” command. Shows 9 line item warnings: “time stamp is invalid. Is ...
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MacBook Air 2013 SSD not bootable, only disk 1 visible, how to recover data?

My MacBook Air 2013 A1466 SSD (samsung 12 and 16 pins) is not bootable anymore, the operating system on the SSD cannot be found. In Disk utility I can only see Diks1 Mac OS X Base System. I put OS X ...
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2answers
1k views

No startup / boot chime; how to bring it back?

I'm one of the lucky (?) guys who managed to get a new MacBook Pro 2016 (the version that introduced the Touch Bar). This MBP model does not have a boot chime by default. There are documented ways ...
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1answer
271 views

Disable boot chime on late 2009 MacBook without macOS installed

I would like to disable the boot/power-on chime on a late 2009 MacBook. However, my system does not have macOS installed at all. Is there a way to do this without reinstalling macOS? The machine has ...
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24 views

Boot Camp - Apple SD Card Reader not recognised

I've issues with my Boot Camp instance. The following happened/happens: - my JetDrive SDXC Card is shown on Mac OS Catalina and works properly; - I installed carefully Windows 10 with Boot Camp ...
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3answers
24k views

How to convert a drive from the GPT format to the hybrid GPT/MBR format when using High Sierra (macOS 10.13.2)

Previous versons of OS X and macOS automatically converted pure GPT drives to hybrid GPT/MBR format when the 2nd, 3rd, and/or 4th GPT partitions were formatted "MS DOS (FAT)" by the Disk Utility ...
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1answer
37 views

How do I install Windows 10 on a Mac Mini that is booted from an external SSD?

I have a Mac Mini 2018 that is booted from a 2TB external SSD. I would like to install Windows on the internal 256 GB SSD. Preferably using the entire internal disk. When I run Boot Camp Assistant it ...
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1answer
30 views

24" Intel iMac (2006) date and time keeps resetting on boot, even after new battery and NVRAM reset

Since a week my iMac, running Snow Leopard, behaves strangely in two ways: First, I always unplug the iMac when I don't use it. Now, when I plug it in, it immediately starts, without me pressing the ...
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4answers
9k views

MBP boots only through single user mode

After using my MBP and shutting it down as usual, it fails to boot. If no keys are pressed during booting ( normal boot ), a progress bar will appear on the bottom side of the screen, moves slowly, ...
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How to create a macOS launchd/launchctl task to launch at bootup or login? [closed]

How do I create a launchd service (?) to run a simple script (in this case: /etc/wireguard/wg-reload) at boot or login time? (I've skimmed the following StackExchange answers: this and this and this--...
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Mac on starting show black screen with folder icon

I'm on Macbook Air Macos Sierra I actually deleted the Recovery HD partition. Although I backed up the recovery files in external. Have MacBackup with Time Machine.I was trying to recover space by ...
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1answer
4k views

Ghost partition, Windows BSOD

Today I was trying to set up Windows on my MacBook Pro (15", Late 2011) over BootCamp. I used the modified Info.plist-trick to create a bootable Windows 8 USB-drive and create a Bootcamp partition. ...
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1answer
45 views

Your computer is disabled. Try again in 60 minutes. Firmware password

I need to factory reset a 2019 Mac Mini with the T2 chip. Understood this is a big challenge. Mini was caught in the "Your computer is disabled. Wait 60 minutes." boot loop using the guide at: Your ...
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20 views

Windows 7 bootcamp does not boot after cloning

I have recently upgraded my older SSD to a larger one. I successfully cloned MAC partition (from old SSD), resized it with Disk Utility - everything runs well on Mac side. Then, I created a bootcamp ...
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13 views

Disk corruption found in Disk Utlity in Safe Mode, but no corruption found if booting into Recovery Mode. How do I fix it?

After installing a minor update to Mojave (did not try to update to Catalina yet), my iMac freezes during startup (progress bar stuck at about 90%). I can get to Safe Mode, where Disk Utility reports ...
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19 views

Mac OS partition type: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF after I tried to remove Linux partition

I have Mac OS (catalina) with Linux Ubuntu and after I tried to remove the Linux partition my Mac can’t boot anymore ( I actually have no option to boot). gpt -r show disk0 diskutil list dd if=/dev/...
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1answer
56 views

Prompted to enter system lock PIN code to unlock Mac

A former terminated employee Fedex'ed us his company Macbook Air. When we turn it on we get this screen you see in the photo below. We do not have this 6 digit "system pin", never set it up, and are ...
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3answers
4k views

Macbook boot problems - 1 long beep, then nothing, then it's fine

My girlfriend's Macbook (white unibody 2010) is having some problems booting. It can be erratic, but it generally seems to follow this pattern: Turn it on, 1 long deep beep, and then nothing (light ...
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1answer
37 views

macOS partition startup Volume and Recovery Disk type FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF plus part of the disk corrupted?

I have a situation very similar to the ones depicted in two previous questions I found (this and this), but still different (I address why my situation is different later on in the question). The ...
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1answer
126 views

Can this 800 MHz iMac G4 boot into Mac OS 9?

I'm trying to find a legacy Mac that I can use to boot into Mac OS 9. I've found an old iMac G4 in the classified ads, but it has Mac OS X currently installed and I'm not sure if it's compatible with ...
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0answers
18 views

Marking the EFI system partition on a USB flash drive as bootable

Using only MacOS (no GParted or other Linux utilities), how do I mark the EFI system partition on a USB flash drive as bootable? Insert an empty USB flash drive and launch Disk Utility Erase the ...
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0answers
51 views

Can't install Mac OS Sierra on iMac 27 inch late 2009 with 1TB HDD not shown

About one month ago I upgraded my old iMac to High Sierra 13.6 without much thinking of risks involved. For a few days my iMac seemed working fine, but then it became very slow, eventually can't boot ...
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4answers
10k 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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1answer
65 views

Stuck on boot loop after upgrading iPhone SE 10.3.3 to 13.3.1 via iTunes

I have an iPhone SE. It was running iOS 10.3.3, and I finally made the jump and upgraded to iOS 13.3.1 via iTunes. My computer is running Sierra so I'm only on iTunes 12.8.2.3 if it's relevant. Since ...
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2answers
5k views

Mac book Air Does not start without charger connected

When I close the lid of my macbook then it does not boot on opening the lid again. The battery is 100% charged, It boots only when I connect the charger and takes 3-4 minutes charge before it starts ...
2
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1answer
56 views

Cannot boot Ubuntu on a triple boot system (Catalina, Win10, and Ubuntu 18.4.4)

I am running a 2012 Macbook Air (5,2) with a 1TB SSD installed. I plan on using Mac as my main OS, windows for apps unavailable on mac, and linux for programming. Using the Mac Boot Manager (hold alt ...
2
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1answer
27 views

Will iMac boot chime play if there is no CPU?

So I got this iMac from auction, as is. The iMac chimes when I press the start button but the screen remains black. Is it possible that the iMac chimes if it has no CPU? I just wanna make sure if the ...
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2answers
162 views

Earliest way to disable wifi at login or boot

I'm running Catalina, and the OS will always turn wifi on at boot. I've been looking into methods to turn wifi power off when I login, and I've created a .plist: <?xml version="1.0" encoding="UTF-...
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2answers
1k 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 ...
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3answers
32k views

Need a bootable OS X installer iso [duplicate]

I removed the OS X partition off my HDD and installed Ubuntu. Now I want OS X back but I can't install it considering I have no access to Mac OS X. I need either an OS X Snow Leopard or OS X Lion .iso ...
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0answers
20 views

Mac mini Late 2014 No power after HDD upgrade

I've followed a very reputable guide online on doing a HDD upgrade with the proper tools and setup. I feel as if every step was followed properly yet the Mac currently doesn't power on. Could someone ...
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0answers
21 views

Mac Mini fan spinning up and stopping

i have a big problem with my Late 2012 Mac Mini. Whenever i start my Mac the fan spins up, makes a knocking noise along with a whistling noise and stops abruptly. This cycle continues for a while ...
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0answers
44 views

Mac mini does not boot

I have an old Mac Mini 2011. It used to work perfectly fine. However, when I turned it off for a couple of hours, it stopped to boot. Only fans are working hard when I switch it on. Screen is black, ...
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1answer
92 views

Cannot get any macOS or Linux OS to install on iMac

I am having a strange issue with my Mid 2010 27 inch iMac - I get the chime, I can get into recovery partitions and into installer USBs no problem...but I can't seem to get a single install working. ...
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1answer
84 views

Make USB hard disk with OS X bootable as startup disk?

Some years ago it was easy to clone the current system partition of a Mac computer to an external firewire hard disk and then use this as a startup disk for the same Mac or even for another Mac. When ...
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33 views

Can’t boot up Macbook after failed reinstall

Yesterday I got my first MacBook Pro mid 2015 in very good condition. Everything was working fine until I decided to do a fresh start and reinstall the OS. I booted up in Recovery Mode in Disk ...

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