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 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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25 views

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
293 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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70 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
27k 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
49 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
31 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 ...
6
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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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0answers
20 views

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
121 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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0answers
29 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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0answers
14 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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0answers
25 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
310 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
49 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
133 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
36 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
126 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
14k 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
136 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 ...
2
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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
121 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
31 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 ...
4
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2answers
204 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-...
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 ...
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3answers
35k 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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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
46 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
45 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
94 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
88 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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0answers
34 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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1answer
28 views

MacOS after change of Motherboard

If I want to change the motherboard of a MacBook with a new one and I install on it the same SSD I had on the previous motherboard that has installed the OS and everything. When I boot the Mac with ...
6
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4answers
2k views

iPhone 6 Boot loop and Error 9

I have a problem with my iPhone 6. My iPhone 6 bootloops similar to this question: Why would my iPhone 6 be stuck in a dead battery loop? However, the answers there do not help. In addition, when I ...
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0answers
74 views

OSX Server can't be blessed anymore

I have a headless Mac Pro running as a server, with Mac OS 10.12 I can reach it via Terminal. I can no longer set the Startup Disk by running: "bless -mount "/Volumes/Startupdisk" -setBoot. Even ...
3
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2answers
6k 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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0answers
15 views

What does error -2003F mean? [duplicate]

I was on CMD+R menú, then I clicked MacOs Utilities>Delete Mac, the computer started with a question mark folder on the screen, I pressed CMD+R and the computer turned on Internet Recovery Mode, but ...
5
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2answers
148 views

Where are the MacOS startup boot icons located?

Where is the exact location of certain icons like the internal storage drive icon you often see in the startup boot manager and other boot icons like it located on MacOS? MacOS Catalina 10.15.2
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2answers
5k views

Your computer is disabled. Try again in 60 minutes

I need to factory reset a MackBook Pro. Every time I start it up it takes ages to load and then I see this: Your computer is disabled. Try again in 60 minutes. I tried to restart the Mac with CMD +...
1
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1answer
108 views

Partition Type: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF appeared when tried to remove Linux(UBUNTU 18.04) from dual boot from Mac

I earlier had dual-booted my MacBook Pro(2013), Catalina OS with Ubuntu 18.04 LTS. I wished to remove it, so I erased the unwanted partition in disk utility and restarted my mac, it did not show the ...
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1answer
184 views

Is the sudo bless --mount command in macOS deprecated. If so, what is in use now?

After installing some other operating system like Linux, I would use some version of the sudo bless --mount command like $ sudo bless --mount /Volumes/EFI --setboot --file /System/Library/...
3
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1answer
206 views

Triple boot on MBP 2019 (T2)

My goal was to install onto a 2019 Macbook Pro (with a T2 chip) : OS X Catalina Windows 10 Pro (1) Windows 10 Pro (2) I managed to do so by using Bootcamp for the first Win10, and a bootable USB to ...
3
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2answers
4k 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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0answers
23 views

iMac 21.5" Mid 2011 - Stuck on white screen at boot

The problem is that the iMac displays the Apple logo then flashes black before getting stuck on white screen. What I've tried so far: Safe Mode (⇧) - not working, can´t get into Safe Mode, loading ...
5
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2answers
31k views

Can't start Mac in recovery mode - only get folder with question mark instead

I can't start my MacBook Pro 2017 using controlR, controloptionR, or shiftcontroloptionR. For all combinations I only get the folder with a question mark shown. What can it mean and how can I fix ...
5
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3answers
22k 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
393 views

Booting from MBR USB on Mac

I have a MacBook Pro8,1. For experimental purposes I've installed Windows 7 to USB (it's NOT an installer, a real OS on USB) via WinNTSetup on other PC. When I'm trying to boot from the USB with the ...

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