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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Jetdrive 850 install on Macbook Pro 2015
I have a Macbook Pro 2015 that I bought used. When I bought it, OS 10.13 (High Sierra) was installed, but the SSD was failing. I bought a JetDrive 850 to replace it, and put the High Sierra installer ...
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6 views
Imac 27" (late 2012) stuck in boot loop. Cant start recovery mode or safe mode [duplicate]
So yesterday I was playing blizzard games when my mac crashed, so I had to do a hard reboot. This was strange as it have never happened before. After boot, everytime I started the game it would crash. ...
1
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1answer
10 views
How do you boot verbosely when booting off an alternate device?
I've got a problem where boot is failing when booting off a USB stick.
So, I hold option down to choose the USB stick, but if I immediately hold down command-V after, it still boots with plain grey ...
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0answers
25 views
Macbook Pro Won't Boot off of USB Flash Drive
Model MacBook Pro 2010 6,2
OS X version Yosemite 10.10.3
I used createinstallmedia to format and create an install USB stick. This step went fine.
When I attempted to boot it, it starts up, I can ...
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0answers
24 views
MacBook Air 2013 rebooting when waking up from standby
I recently started having this problem with my MacBook Air 2013 (i7/8GB) running the latest High Sierra:
Sleep itself works perfectly fine. If I wake up the device within the standbydelay of 3 hours, ...
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0answers
26 views
MacBook Pro Mid 2009 shows forbidden sign but boots when holding command key
After upgrading from High Sierra 10.13.x (can't remember) to High Sierra 10.13.6, something went wrong with the boot partition. When turned on the MacBook shows the forbidden sign. However when I ...
2
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1answer
23 views
What is normal for startup chime till Apple logo shows?
My late 2015 iMac recently started taking a very long time to go from the startup chime till the Apple logo appears - about 2.5 minutes. Between the chime and the logo, the screen was black.
After ...
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2answers
23 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 ...
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70 views
MacBook Pro 2018, 15" no external devices when booting
My MBP 2018 15" is not showing any external devices when booting with Alt/Option key.
I went to Recovery Mode -> Startup Security Utility -> External Boot -> Allow booting from external media, but no ...
4
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1answer
101 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 ...
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1answer
44 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
29 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 ...
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0answers
24 views
Why is my MacBook Air not finding the trackpad's button-click on boot-up, until AFTER a password has been entered?
INW, the Trackpad's tap/open function won't work until after I plug in a mouse & use it to click inside the text window to show a flashing cursor.
This means I cannot cold-start my MacBook, ...
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0answers
58 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 ...
4
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2answers
191 views
Single-user-recovery mode on High Sierra 10.13.6
Before High Sierra 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 enters single-user mode (...
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1answer
17 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 ...
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0answers
10 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 ...
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1answer
24 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
68 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
15 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
20 views
Macbook Pro, Screen lines, Internet Recovery crashes to a blue lined screen
Macbook Pro 13 with High Sierra.
The machine crashed with strange screen lines.
Rebooting crashed again with screen lines but it got to the desktop.
It now only gets half way trough the boot and ...
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0answers
19 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
308 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 click (or select) windows it boots into Mac. I've tried selecting both Mac and ...
1
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1answer
78 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
37 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 ...
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0answers
105 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
21 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:
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1answer
31 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-...
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1answer
45 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 ...
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1answer
14 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 ...
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0answers
33 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 ...
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0answers
12 views
Unable to boot into Bootcamp drive after distil repairDisk
All,
I've run into the problem where I am unable to boot into my windows 10 pro bootcamp partition on my late 2017 MPB.
Previously I was unable to locate the bootcamp partition the startup disk ...
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1answer
172 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 ...
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1answer
62 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 ...
1
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1answer
54 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
27 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 "...
1
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1answer
35 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
2answers
211 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
693 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
75 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 ...
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0answers
27 views
PowerBook G4 Blue screen at startup
I have a Powerbook G4 that, on startup, shows an annoying blue screen, and after a few seconds, flashes black and flash blue again with a cursor. I can't reset PRAM or NVRAM or boot in Verbose or ...
0
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1answer
22 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 ...
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0answers
28 views
Cannot boot into macOS after attempting to remove Ubuntu partition [duplicate]
The answer that really helped me and is the right duplicate is this one. Ignore the question marked as duplicate if it's a different one.
Issue + background
I have Ubuntu 18.04 dual booted on my ...
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0answers
68 views
MBP stuck at boot
I initiated the 10.13.5 update and I went to do other thing in the mean time. When I came back I saw that it's rebooting but the loading bar has stopped at 75% and it wouldn't boot into the desktop. I ...
0
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1answer
76 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 ...
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0answers
47 views
MacBook Pro not booting after upgrade from 10.10.2 to 10.10.5
17" Mid 2009 A1297 MacBook Pro has not been going to sleep when on battery power.
Possible reason may have been pending OS (mostly security) upgrade from 10.10.2 to 10.10.5 that was on offer for a ...
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0answers
32 views
Stuck on boot screen - Timeout IOFirewireLocalNode
Mac gets stuck in boot screen with apple logo. Verbose log shows, there is timeout in IOfirewireLocalNode. This happens, whenever I make my Mac sleep, very often. There are no pattern for these ...
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0answers
23 views
ipxe boot an old macbook 3.1
Got ipxe working on an old Macbook Pro (3.1 / Year 2007). It booting via usb stick from an EFI partition. It successfully loads the ipxe.efi and shows a ipxe menu afterwards. However it seems like ...
1
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1answer
28 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 ...
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0answers
44 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 ...
