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

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3 views

MacBook Pro 2011 15" starts booting then goes to blank gray screen

When I boot the MacBook Pro, it chimes and shows the Apple logo and progress bar. The progress bar gets roughly halfway, and the screen goes totally gray. There is no mouse cursor, and waiting 10 ...
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0answers
8 views

i can't see my bootable Windows USB on my Mac boot screen

So I installed Windows 10 on my Sandisk Cruiser Blade 32 GB using win 2 usb (software) and it works fine on my late 2011 MacBook Pro but when I plug it in my mid 2010 iMac and boot it holding the ...
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2answers
10 views

how to access Macbook Pro hard drive after network boot (OptCmd-R)

My mac won't boot. I need to re-install OS. But hard disk is too full, so I need to delete some files. I boot Opt-Cmd-R then open menu > Utilities > Terminal but bash shell only shows boot partition ...
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0answers
6 views

after boot, macbook white apple and status bar briefly display every 10.0 seconds then go black

PRESENTLY: My MacBook Pro won't boot up. Screen is totally black, except that exactly every 10 seconds it BRIEFLY re-displays white apple, full white horizontal status bar, and the spin gear below. ...
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0answers
13 views

Booting and Running Windows 7/10 from external USB [duplicate]

I have a 2013 MacBook Air (4GB/128GB). I do not have the resources for a virtual machine and do not want to partition the hard drive. Can I have Windows 7 or 10 on a 128GB USB 3 Flash Drive. I want ...
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0answers
17 views

Cannot boot into successful winclone restored windows

I restored a winclone image containing Windows 10 to a new partition on my machine. Everything went well, but after the process completed, I was not able to boot into the restored Windows. If I select ...
1
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0answers
21 views

MacBook Pro 2009, can't format/fresh install

So, i'm in a (bit of) a pinch. I was doing a format/fresh install of MacOS on my old 13-inch 2009 MacBook Pro going through OS X Utility and Reinstall OS X. Unfortunately when i do enter my Apple ...
0
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1answer
14 views

Grey screen apple logo prohibitory sign etc MacBook 2009

I have an older Mac book that will not boot. I have tried all key commands including fcsk which resulted in a "mach kernel" end result, so nothing worked. I don't have a system install disk (bought ...
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0answers
25 views

Black screen after chime before booting

I have a mid 2014 rMBP 13". When turning it on, I can hear the chime and then the screen remains black for a variable amount of time between 15-25 seconds. It doesn't always happen, the issue seems ...
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0answers
17 views

Can rEFInd startup from APFS volume? [closed]

Supposing I'll update my iMac to Sierra, will it be possible to boot into macOS from the rEFInd boot manager - or not?
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0answers
12 views

What programs are run when in safe mode and waking up from sleep?

I have been having some terrible issues with my MacBook Pro Retina in that it randomly shuts down within 5 minutes of booting up. I seem to have isolated a problem free environment to safe mode ...
0
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1answer
13 views

Powering off/crashing during startup MacBook Pro mid 2009

I have a MacBook Pro mid 2009 that crashes during startup after the chime and once in a blue moon gets as far as the login screen before crashing. Crashes during safe reboot or recovery reboot too ...
0
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2answers
27 views

iMac 2009 frozen on boot screen

This morning I needed to reset an administrator's account password on my Mac, because I had forgotten the password. I used the steps listed on this article to accomplish this, but after restarting ...
0
votes
1answer
48 views

Macbook 2016 shutdowns during start, safe mode working

I bought an Apple Macbook with Retina display (Core M, 8GB RAM, 512GB SSD) and today I was experiencing the first problem with it. I was unable to log in to my account. During the login process mac ...
0
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0answers
36 views

Boot Loop - Trying to make a Yosemite KVM VM w/Chameleon Bootloader

I am trying to boot a Yosemite VM (10.10.5) following these instructions here. But it gets stuck in a loop at the BIOS boot screen (the OS has not yet been installed) My hardware is a Mac mini with ...
1
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1answer
34 views

Does OS X El Capitan have a /boot folder

I know that the /boot folder contains the static files of the 'boot' loader. I'm just curious to why I can't see this folder on my Mac. Im using OS X El Capitan. Does OS X El Capitan have a /boot ...
0
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1answer
13 views

Mac osX boot camp issue

i tried installing windows 8.1 on my mac osX and while the boot camp process was on the disk partitioning was in process and my mac suddenly restarted with a bootcamp error. now there is no windows8.1 ...
0
votes
1answer
29 views

How to repair bootcamp after partitioning for triple boot

I already had El Capitan and Windows running smoothly. I needed to add a partition so I could triple boot into Ubuntu. OS X and Ubuntu both work perfectly now but my Boot Camp side seems to have ...
0
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0answers
29 views

MacBook Pro startup problems

My MacBook Pro 8,1 Late 2011 was working fine till yesterday. Current issue, 1 - it takes approximately 20 mins to start which goes like this: Then this happens: Then it gets stuck on this, ...
-3
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0answers
27 views

I raged at my Emac and deleted almost all of the system before coming to my senses. but by then i had deleted the kernel

I raged at my Emac and deleted almost all of the system before coming to my senses. but by then i had deleted the kernel. So I had to put linux ubuntu on a usb and when i held alt(option) it came up ...
0
votes
1answer
37 views

How to repair a drive after accidentally changing the partition scheme?

I was using the Boot Camp. Somehow I managed to change the GPT partition scheme on my external hard drive to a MBR partition scheme. Below is the output from the command sudo gpt -r -vvv show /dev/...
0
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1answer
29 views

Windows 10 No Boot Device

I made a bootable Windows 10 flash drive using Bootcamp on my MacBook. When bootcamp is finished with everything it restarts my computer like normal. But when it restarts so I can install Windows, it ...
0
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1answer
38 views

MacBook taking long time to load the boot loader; rEFInd freezes

I have a MacBook Pro 2015 and I am dual booting with Linux. I use rEFInd and since day 1 it has been working fine on most occasions. Sometimes it would take a long time to show its screen and then it ...
0
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0answers
31 views

EFI boot option not appearing on startup

I am trying to install an Ubuntu Server distro on my old disused iMac, however after creating a live USB on my macbook pro no EFI boot option appears. I also tried burining a version of the image to ...
1
vote
1answer
15 views

How can I check if a new hard disk is detected by Mac EFI at boot?

I have a Mac Mini (late 2012) and have added a new hard disk drive in it. But Mac OS 10.10.5 is unable to detect it. If this were a PC, I'd check the BIOS to see if it was detected and listed there, ...
0
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1answer
42 views

MacBook Pro will not boot, begins to load then hangs with white screen [duplicate]

I am unable to get my MacBook Pro to boot. It turns on, and the Apple logo + loading bar appear however after a minute or so of loading it eventually changes to a white/grey screen and just hangs. ...
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0answers
16 views

MacBook Pro Retina 15" late 2013 shuts down suddenly [duplicate]

I'm not sure how to post a diagnostic here so if you have any tip, tell me I will post it. I just got a MacBook Pro Retina 15" late 2013 that shuts down randomly without any warning. Sometimes it ...
0
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0answers
23 views

MacPro 3,1 (early 2008) won't start after crashing

I have a MacPro 3,1 (early 2008) with OS X Lion (updated). We were working on editing a movie with Final Cut Pro, then the screen went blinking and a kernel panic occurred. Since then, it is ...
0
votes
1answer
23 views

Boot MacMini (2014) from USB

Here is the problem. A long time ago, I set my Mac Mini to dual boot (using Bootcamp, but with some third-party repartitioning). I proceeded to install rEFInd, and eventually, to triple-boot. To ...
0
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0answers
20 views

Win2usb OS works on PC but not on MBP

I have a MBP with windows 7 64bit Bootcamp installed. I also have refind installed. I have a win2usb 1tb drive with a fresh windows 7 32bit installed and it boots up perfect on a test PC. Refind ...
0
votes
1answer
50 views

Windows (bootcamp) won't boot from hdd in optical drive bay

I have a mid-2012 MBP and I have done ye standard mod of replacing the original HDD with an SSD and shifted the original HDD into the optical drive bay. I then installed OSX (or should I call it ...
0
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0answers
24 views

MacBook Pro 15" 2011 stuck in kernel panic on boot

I recently purchased a used MacBook pro 15.4" from 2011. The previous owner said that it keeps beeping 3 times at boot. I figured it's just a faulty RAM bar, which I had a spare one. He also stated ...
0
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1answer
56 views

Grub on Mac via EFI (Linux: /dev/sda1 Darwin: /dev/disk0s1) (MacBook Pro Early 2011 if it matters)

I installed Debian Jessie 8.5 on my MacBook Pro over my old Bootcamp partition (Windows 8.1). I deleted the bootcamp partition with the partition manager in the Debian Installer and created two new ...
0
votes
1answer
49 views

Hard Disk problems, unsure of how to proceed

A couple of days ago, I closed the lid on my 2012 MBP running El Capitan with Samsung Pro 830; it had nearly no power left. Power ran out while I was closing the lid, I suspect, so I plugged it in, ...
3
votes
1answer
235 views

Installing Ubuntu 16.04 server on Mac Mini 2006

I have liberated an old 2006 Mac Mini (Model: A1176) from being thrown away and wanted to use it as a Time Capsule for my other Macs. To do this, I want to install Ubuntu server 16.04 LTS to roll my ...
0
votes
1answer
44 views

How can I safely create a partition to an already bootable drive

I already asked this question on Apple's community forum, right here, so I'll post the answer here if something comes up there first. This is my problem : I recently bought an external drive of ...
0
votes
1answer
92 views

iMac loading bar gets stuck halfway then reboots

OSX 10.11.5 iMac turns on fine but loading bar gets to just over 50% and then a horizontal bar across the screen shows, then the screen goes black then to white. It stays at white then iMac turns ...
1
vote
1answer
48 views

HDD corruption after power cutoff

Yesterday a breaker tripped in the same room as my Mac Pro 1,1 running Yosemite (Hacked boot.efi.) All other machines powered up but this one. Attempting to mount via Target Disk Mode timed out, so I ...
0
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1answer
42 views

How to Rescue OS X without Visible Startup Disc?

I need to delete refind but I cannot do it because I bypass it, since I cannot see visible startup disc. I stopped partition process where I tried to erase Linux partition because of infinite time in ...
0
votes
1answer
43 views

Recover mac mini broken BIOS (mac mini displays nothing)

Well, month ago I gave mac mini (late 2011) to my little brother with new HDD and RAM memory stick. So, being an independent person, he has tried to install Windows on empty HDD (yeah, it's weird) and ...
1
vote
1answer
24 views

Troubleshooting: Apple booting to Prohibitory Sign

So my macbook pro (2012 Intel i5 6gb ram), has been starting up to the prohibitory sign. This sign will kinda sway back and forth between the apple symbol and the prohibitory sign. Every once in a ...
2
votes
1answer
64 views

To Rescue Nonbooting OS X with Grub?

I had Refind bootloader in Macbook Air 2013-mid. My disk has OSX and broken Ubuntu. Ubuntu messed up my bootloader such that it starts only. I cannot go to grub/refind by pressing ALT, ALT-R, ... My ...
0
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0answers
46 views

Cannot boot into offline recovery partition in El capitan

I removed Boot Camp, then every time I use CommandR my Macbook Air starts Internet recovery. The weird thing is that the recovery partition is still there. Note my Internet connection is only 512kb/...
0
votes
0answers
41 views

Problem Installing Kali Dual Boot on Mac OS X El Capitan

I've tried installing Kali by installing refind, reverting my CoreStorage main partition, resizing it to free 30 GB, and burning the Kali ISO to a USB using the Mac Linux USB Loader. However, when I ...
0
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0answers
53 views

No bootable device, insert boot disk (Windows 7 already installed)

Recently I installed Windows 7 Ultimate via Boot Camp Assistant on my MacBook Pro and everything was going alright. I wanted to share files between my two operating systems so I created a fat32 disk ...
0
votes
1answer
119 views

SSD not working internally

I recently bought a Corsair Force LE 240GB SSD and tried to do a net recovery on a macbook pro A1278 (MacBook Pro 13" Early 2011 with i5) to the latest El Capitan, but for some reason, this is only ...
1
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0answers
93 views

refind : No bootable device (Mac and linux)

I just make dual boot on my macbook pro with linux fedora. when I enter linux on refind menu, it says "no bootable device -- insert boot disk and press any key". I know this question has been ...
1
vote
0answers
48 views

Cannot boot into OS X after partitoning

I have installed Ubuntu on a Mac Mini, everything works great. I'm able to switch back and forth without any problems. After that, I used GParted in Ubuntu to resize the OS X partition. I then create ...
0
votes
1answer
24 views

Trouble to boot into OSX after install windows 10 on MacBook pro

Before this problem win + OSX worked fine. But I tried to settings>recovery>Advance Startup from windows. after a restart , there is no two boot option . only windows boot option is appear. But how ...
0
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0answers
15 views

Minimum requirements for Mac Book Pro Core2Duo to boot

I got an older Macbook Pro as a present, without battery and harddisk. Memory is installed, LED power adapter is on. Since the machine doesn't boot, my question is if I have to install harddisk or ...