Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange
Join us in building a kind, collaborative learning community via our updated Code of Conduct.

Questions tagged [boot]

Questions about booting, the process of starting a computer and putting it into a state of readiness for operation.

1
vote
2answers
20 views

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 ...
0
votes
0answers
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
vote
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 ...
1
vote
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 ...
1
vote
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, ...
1
vote
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
votes
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 ...
1
vote
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 ...
0
votes
0answers
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
votes
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 ...
0
votes
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 ...
0
votes
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 ...
0
votes
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, ...
0
votes
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
votes
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 (...
1
vote
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 ...
1
vote
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 ...
0
votes
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
votes
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 ...
0
votes
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.)
0
votes
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 ...
0
votes
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 ...
-2
votes
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
vote
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
votes
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 ...
0
votes
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
vote
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:
0
votes
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-...
0
votes
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 ...
0
votes
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 ...
1
vote
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 ...
0
votes
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 ...
0
votes
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 ...
0
votes
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
vote
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
vote
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
vote
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
votes
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
votes
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 ...
1
vote
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
votes
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 ...
0
votes
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 ...
0
votes
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
votes
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 ...
0
votes
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 ...
0
votes
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 ...
0
votes
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
vote
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 ...
1
vote
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 ...