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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54 views

Booting from a previously cloned Windows 10 installation

I have a cloned drive as a backup and my computer is stolen. This computer was probably MacBookPro 11,2. Now i have an old MacBookPro 6,2, i installed my backup drive as an internal drive to this ...
5
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1answer
457 views

Replacing macOS with elementary OS. Computer boots normally into elementary OS, but boot menu (option key on boot) doesn't show anything

I want to replace macOS with elementary OS on a Mac. I formated the entire hard disk, inserted the elementary OS bootable USB, selected EFI boot on the boot loader (only option) and installed ...
0
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1answer
388 views

MacBook pro stuck in a loop after booting

yesterday i turned off my computer as usual nothing strange yet ive noticed that it get so hot lately ( I figured out later that it’s due to dirt in fan , i cleaned it ) ; then today morning computer ...
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1answer
306 views

nvram command not found

When attempting to check the change the contents of the nvram (adding bootup chime, etc.), I am continually returned with the error: nvram: command not found. This occurs even when I attempt to just ...
1
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0answers
511 views

hfs-bless / Booting into MacOS / Windows directly from Ubuntu (triple boot, MacPro 4,1 -> 5,1)

Currently I have MacOS High Sierra, Windows 10 (Legacy, not EFI), and Ubuntu 18.04 triple-booting on a 2009 MacPro 4,1 (firmware upgraded to 5,1). I installed Ubuntu after Windows using the procedure ...
9
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4answers
12k views

Single-User-Recovery-Mode on High Sierra 10.13.6

Before the High Sierra update to 10.13.6 I was able to boot in single-user-recovery mode by holding Cmd-R-S at startup, but after the latest software update booting while holding Cmd-R-S just enters ...
1
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1answer
46 views

Error image slideshow when booting

I am booting an imac from a USB drive containing OS X 10.13. I get an infinite slideshow alternating between the following two images, which don't seem to coherently convey anything. I am able to skip ...
1
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0answers
23 views

Could it be possible to have a nonfunctioning ribbon cable but still be able to access files from the drive?

My question is posed at its most brief in bold below. However I was having trouble making it brief. I will edit it as more follow up discussion develops. I have mid 2012 Mac that is not booting. I ...
0
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1answer
130 views

USB ports not working, no paired magic keyboard, “no bootable device, press any key” on an iMac 2009

Sad story. I thought it was the HDD, so I ended up asking someone to reinstall macOS on it using their Recovery, and that worked. The hard drive booted up using their 2012?ish Mac mini. However, ...
2
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1answer
684 views

sudo disable trimforce doesn't work

Since upgrading to High Sierra my boot time slowed down considerably (from ~10 seconds to 90 seconds). Googling this problem suggests disabling Trim might work as a solution, which you do via the sudo ...
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0answers
21 views

rEFInd text tool tips for boot menu

How can I customize the rEFInd boot menu so that there's text next to the various penguin icons? This is done through the label option? (I'm not at the MacBook presently, but planning ahead.)
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0answers
202 views

rEFInd menu not showing

How do I bring up the rEFInd GUI? It was showing before, but now just directly boots into Mac OS. I've not installed Linux yet, but am preparing to do so. After using disk-utility now rEFInd seems ...
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1answer
2k views

Can't boot into windows with Mojave

So I just installed the Mojave public beta version 10.14, when I turn off my machine and use the option button and select Windows it is always booting into macOS. Disk output /dev/disk0 (internal): ...
1
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1answer
2k views

Create bootable EFI system partition from macOS Installer's firmware files (.scap, .fd)

Any macOS installer contains a folder (e.g. called EFIPayloads) with EFI firmware files named MP61_0116_B17_LOCKED.scap, MBP114_0172_B09_LOCKED.fd or similarly. How does one create a working EFI ...
0
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1answer
411 views

Mac Book 12" (early 2016) kernel panic IONVMeController.cpp:4949

My Problem: Mac Book 12" (early 2016) in use for 1 year without any problem suddenly stopped while working and now cannot be started again / shows this panic report on startup: panic(cpu0 caller ...
0
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0answers
1k views

What does “AMFI: code signature verification failed” mean during single-user boot, and should I worry?

I had to boot into single-user mode for something and during the boot process I noticed repeated error messages, "AMFI: code signature verification failed". What could be causing these, and is this ...
1
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1answer
24 views

Unable to open any applications Terminal System Prefs

OSx has thrown a wobbly on me. I cannot open any applications whatsoever. When booting into safe mode:
0
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1answer
59 views

Can't boot to bootcamp windows anymore

I think I made a big mistake: I wanted to boot to ubuntu from my usbstick, therefore I used the ppa mactel-boot and I could boot into ubuntu (this tutorial: https://medium.com/@mmiglier/ubuntu-...
0
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1answer
76 views

Can I fresh install a Beta version of macOS?

Current Beta access program enables one to upgrade to macOS Mojave from a stable release, but I want to try out a fresh installation instead of upgrading with previous data, so that I can assess it ...
0
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1answer
22 views

Problems with faulty update installer boot

I'm having a problem with a macOS update. In short, I downloaded the update that requires a system reboot. But this happens: at boot time the machine starts the update installation disk, the ...
1
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0answers
1k views

Boot from time machine backup

As Apple suggests, Mac running OS X Lion v10.7.3 or later should be able to boot from Time Machine backup disk. I followed the instructions on this page https://support.apple.com/en-us/ht202796. I ...
0
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2answers
9k views

Windows support software could not be saved to selected drive, Error Installing Win 10 on MBP2017. I Already did SVC, MVRAM reset

I have already did SMC and NVRAM Reset, and also using first aid on my single partition drive. Still doesn't work. First, before I was used first aid, and did NVRAM- SMC reset. The title is "Disk ...
0
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1answer
375 views

MacBook Pro 9,2 can't read an SSD with a macOS High Sierra OS

Good day everyone. I have a Macbook Pro 9,2 that can't read an SSD that has a macOS High Sierra installed on it. For the background context, a friend gave me her Macbook Pro for me to retrieve the ...
2
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1answer
545 views

Boot Camp Partition Broken after Partitioning and can't be Repaired in OS X 10.9.5 (on Macbook 13" Air - Late 2014)

I have a late 2014 Macbook Air that is running Windows 7 via bootcamp. Everything has been humming along fine until I recently made an update to partitions (via "Disk Utility" shrink size of Mac ...
1
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1answer
87 views

Is it normal for 1000 threads to launch on booting up MacBook Pro?

My MacBook Pro is very slow immediately after booting up. Only after 5-6 mins have passed after booting, I am able to launch any application or use my MacBook properly. When I checked processes using "...
3
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2answers
922 views

tmutil - Failed to delete local snapshot

My mbp is stuck on boot and fsck cannot be performed because of: snap_metadata_val object (oid <aléatoire>): invalid extentref_tree_oid (0x0) It happens that I have dataless snapshot and if I ...
1
vote
1answer
48 views

Shortcut to multiple commands for cleanup

To clean up cache and log files, I prefer to run following commands via terminal on daily basis (once a day, mostly in morning). rm -rf ~/Library/Logs/* ~/Library/Caches/* sudo rm -rf /Library/Logs/* ...
3
votes
3answers
519 views

Bootcamp: My Mac Only Boots into macOS No Matter What Partition I Choose

I have a 2017 Macbook Pro 15 inch running 10.13.5 and a bootcamp partition of Windows 10. I cannot boot into windows unless I select the windows partition from system preferences and restart from ...
0
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1answer
2k views

Bootcamp Windows 10 Fails to Start After Interrupted macOS Update

I recently installed the macOS Mojave developer beta on my MacBook Pro. Everything worked fine and I could start both macOS and Windows. Today, when updating to the beta 2, however, the installation ...
0
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1answer
270 views

Change boot device on Mac OS X 10.10 to an AFP partition

My Mac Pro ran with Mac OS X 10.10 until last week. I split the disk into two partitions, mirrored the OS and updated it on one partition to macOS 10.13. After the update I changed the startup disk ...
0
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1answer
27 views

Boot camp assistant can only change disk1

I'm trying to setup and iso file on a flash drive from my macbook using the Boot camp assistant. It recognizes the iso file, but I am only given one option of using it on disk1 of my own computer and ...
0
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1answer
601 views

My iMac won't boot. Every time, no matter what mode I try booting in, it boots and stays on a blank white screen

I have a problem with my iMac. When I tried booting it, the loading bar went half way, slowed way down, then about 20-30 min later, the bar had gotten all the way to the end... But it stayed on the ...
2
votes
1answer
67 views

iPhone stuck on boot screen

My non-jailbroken iPhone 6S Plus (iOS 9.3.5) failed to boot up to the lock screen (stuck in apple logo) after the battery was depleted. Hoping to keep my data intact, I have tried several online ...
1
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0answers
267 views

PowerMac G5 stuck with full fan in OF, no boot devices

I'm working on a PowerMac9,1 (Late 2004 PowerMac G5 with single core) that refuses to recognize any external boot devices on the option/alt boot manager screen, including Debian and the Mac OS X ...
4
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0answers
87 views

Deleting a linux dual boot on mac

I have a linux dual boot installed with rEFInd, which I want to delete. I tried to just delete the disk partition, but that throws an error. MediaKit reports partition (map) too small. If you ...
1
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1answer
31 views

how to eject a DVD from a MacBook?

On an older Macbook from 2008 the DVD is stuck in the tray. Unfortunately, GRUB isn't booting properly so there's no OS. How can I eject the disk? It's a slot loaded disk, so no button or tray.
1
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1answer
100 views

How can I cold-boot a mac with FileVault enabled without physical access to the mac?

If I had a Linux machine, I'd be able to enter the password for the encrypted boot disk in a serial terminal during the boot process, via another machine connected to the serial port I can SSH into. ...
1
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1answer
90 views

How to install Linux on a macbook? [closed]

How do I install Ubuntu from DVD? it's a 13 inch macbook, late 2008. Intel core duo, 2GB RAM.
0
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1answer
65 views

Experience with booting on a Tempo SSD PCIe card?

I have a MacPro 2009 reflashed as a 2010. I am considering to install a Tempo SSD PCIe card and then put High Sierra on it. This card is advertised to allow booting on it: would anyone have first hand ...
0
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1answer
540 views

How to fix Windows Boot Camp after Linux install/

I am using a 2010 iMac that needs to use the hybrid GPT/MBR to install Windows via Boot Camp. I had a working dual boot install using Boot Camp with Mac OS High Sierra and Windows 10. To install ...
2
votes
0answers
117 views

Macbook Pro OSX 10.11.6 stopped booting

I tried booting my mac today as usual but it turns out that almost immediately the nasty prohibition sign appeared. I tried the usual stuff: resetting PRAM, SMC and nothing. I tried safe mode, but ...
1
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0answers
51 views

Can an eMac boot from a USB optical drive connected via a FireWire adapter?

I've got an eMac that's mostly working (running Tiger, plus a selection of other nice software), but has a broken optical drive. I have a spare USB optical drive lying around, and it works for most ...
1
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0answers
672 views

What is this progress bar, after initial boot, before login, on High Sierra?

This progress bar shows up after POST (and initial firmware boot?), but before the login prompt. The drive is a brand new SSD (from WD and initialized properly), so I'm really doubtful it's an fsck ...
2
votes
1answer
1k views

Mac Pro 3,1 Boot fail diagnosis

I have an old Mac Pro 2008 3,1 which after running pretty much 24/7 for 10 years was left switched off for a two-week holiday. Now when powered up, the PSU & GPU fans spin up, but nothing else ...
2
votes
0answers
271 views

How to boot into internet recovery mode with rEFInd installed?

I have the bootup manager rEFInd installed on my Macbook. The key combinations for recovery (Command R and Command R+I) just boot into rEFnd's bootloader. At this point in time holding the option key ...
1
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0answers
326 views

Disk Utility and Startup Disk pane not loading discs or partitions

I'm running on a late-2016 MacBook Pro with macOS 10.13.3 High Sierra. I recently created and installed a Bootcamp partition. Since installing Windows, both Disk Utility and the Startup Disk pane in ...
1
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1answer
286 views

Grey screen when booting from original disk, doing Internet recovery or booting from High Sierra boot disk

I own a MacBook Pro from 2012 that pops a gray scren everytime I try to boot. When I try to boot from my original disk, the screen is gray with a question mark folder. I tried Internet recovery and ...
1
vote
1answer
446 views

Unable to boot/install any Mac OS/OS X system from/to SSD on my Macbook. Can't read any bootable USB device

I've got a Macbook Pro Late 2012 with a Samsung EVO 750 and 16 gb of ram. I've worked with it for a year with no issues. Two weeks ago, it suddendly got really really slow (APFS on High Sierra). I ...
2
votes
0answers
667 views

SSD RAID card in Mac Pro (Mid 2012) 5,1

question with two parts: Is there any card that has PCIe x4 with AHCI interface (to be bootable on MAC Pro) that takes two M.2 SSD cards? And if teher is does it matter if the SSDs (if the card ...
7
votes
3answers
4k views

Powering up a MacBook Air with non-functional keyboard

I have a working MacBook Air (2015 model) with a non-functional keyboard. Water was spilled on it accidentally which shorted everything out. A 3rd party local computer repair shop got the machine ...