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

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0answers
46 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 ...
3
votes
1answer
3k views

MBPr with El Capitan freezes at or right after login

Here's the problem: my colleague has a MacBook Pro Retina with El Capitan installed and he's been having issues with regular freezes lately. Everything has worked fine under Mavericks for well over a ...
0
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1answer
22 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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1answer
53 views

Can't see Apple_HFS partition after using Minitool Partition Wizard

I tried to reduce my partition size using Minitool Partition Wizard on my BOOTCAMP partition (I didn't touch Apple_HFS partition) now I can't see my Apple_HFS partition in Disk Utility. However this ...
0
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2answers
31k views

White MacBook hangs at gray Apple screen forever, won't boot to single user, won't mount using Disk Utility. What do I do next?

After a forced shutdown, my white MacBook hangs at the gray screen with the Apple logo and an infinitely spinning progress wheel. I can boot in verbose mode, but I didn't see any particular error, ...
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 ...
0
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0answers
41 views

Boot Issues After Boot Camp

Note: I apologize about the excessive use of abbreviations, my phone is my only Internet access right now I recently used Boot Camp to install Windows 10 on a partition of my MacBook Pro from mid ...
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0answers
17 views

How can I boot a WinPE USB on a Macbook? [duplicate]

I have a 2008 Macbook Pro with OS X Yosemite and Windows 7 on a bootcamp partition. Yesterday while trying to create another partition (in windows) I accidently converted my basic disk of primary ...
0
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0answers
48 views

Lion to El Capitan upgrade stuck on restart

I'm upgraded an late-2011 MacBook Pro from Lion to El Capitan. The install itself seemed to go fine. It got to the step where it restarts after the install and now it just hangs on this screen. I'...
6
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3answers
40k views

Boot camp install of Windows 7 issue, no bootable devices

So I have a 2010 15" macbook pro (MBP6,1) and I replaced the optical drive with a hard disk. I wanted to install windows 7 on the hard disk with boot camp with a USB and ISO image. After searching I ...
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2answers
263 views

EFI Boot Frozen When Trying to Install Windows 8.1

I am trying to install Windows 8.1 in Bootcamp on my Mac Pro Early 2009 Edition which should be possible according to this page: https://support.apple.com/en-ap/HT201457 I went through all of the ...
0
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0answers
173 views

Grub Rescue on Mac

I have a problem: yesterday I installed Kali Linux 2.0 on my Macbook air (runs El Capitan). However, after managing to run it, and exiting it, i couldn't find Kali on my laptop anymore. I forgot to ...
0
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0answers
37 views

kernel extension is not always loaded at boot time on OSX

I do have a kernel extension for USB-Devices using IOKitPersonalities. Replugging one of the devices the kext will always be loaded as expected but for devices already connected at startup this ...
2
votes
2answers
897 views

Mac won't boot from USB drive: Prohibited sign

I tried to clean install OS X El Capitan on my Mac, but it won't boot from the USB drive. Here are the steps I took to create the bootable USB drive: (I have a mid 2014 MacBook Pro with Retina Display)...
0
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1answer
32 views

unable to boot Mac OS after installing bootcamp

Installed bootcamp Win7 on my MBPro with Yosemite a couple weeks ago and both OS's worked fine for some time, until recently the Mac OS suddenly decided it couldn't boot anymore. If I select the Mac ...
13
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5answers
3k views

Installing 20+ operating systems on Mac without any virtualization

For a scientific project I need to install these operating systems on my Mac Pro. The catch is... It has to run on a native hardware, no level 1 or 2 virtualization is allowed. Here is the list of ...
4
votes
1answer
13k views

Uninstall rEFInd 0.8-3.7 on Yosemite

I recently tried installing rEFInd on Yosemite using the command ./install.sh --alldrivers however it would not recognise the ubuntu 14.04 x64 for Mac disk I made and so I would like to uninstall ...
1
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2answers
230 views

What font is used to print a verbose mode boot?

When booting OS X in verbose mode (⌘V), the log is printed on screen. It seems different to the kernel font, but it might just be a smaller version of it. inverted screenshot Yosemite 10.10.1 ...
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3answers
3k views

Mac Pro: Kernel panic during HDD boot and DVD boot

I have a 2007 Mac Pro (OS X Tiger 10.4.11) that cannot boot up anymore since a few days. I see the grey screen with the apple logo and the rotating circle. After a minute or so I get a kernel panic. ...
1
vote
1answer
93 views

OS volume shows as type 'FFFFFFFF-FFFF-FFFF-FFFFFFFF' after attempting to delete some Linux partitions—cannot log in

I was unable to just delete the partitions left by an old Linux Mint installation by pressing the '-' button in disk utility. I looked online and read that I could reformat them to a journaled format ...
0
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1answer
545 views

Hard drive boots over USB but not when install internally

I am trying to upgrade from a 500GB HD (http://www.newegg.com/Product/Product.aspx?Item=N82E16822136314) to a 1TB HD (http://www.newegg.com/Product/Product.aspx?Item=N82E16822152291). The only spec ...
0
votes
1answer
60 views

2012 Macbook Pro Boots With Startup Sound, But Has Black Screen

This is sorta urgent, since my dad's whole business relies on his computer, and it needs to be fixed. Anyway, it will startup and and make the mac "on" chime. But after that, nothing happens. We can ...
8
votes
4answers
33k views

How do I get rEFInd working with OS X 10.11 El Capitan?

I noticed that I could not install and use rEFInd after upgrading to OS X 10.11 El Capitan. This restricts me to OS X so I cannot boot my Linux partition. I get the following error: error "Could not ...
1
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0answers
63 views

Boot Windows from USB with EFI password

I've created an USB with Windows 10 from where I can boot: Restart pressing option. Select USB EFI partition. Windows starts. When EFI password is active it will be asked when booting pressing the ...
0
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1answer
68 views

NTFS appears every time

Every time I boot my Mac, an "NTFS for Mac OS X" window appears. In the settings I can't change this. Here is the window I have El capitan 10.11.4 I found this: To resolve the issue you need ...
0
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0answers
327 views

'the 'grub-efi-amd64-signed' package failed to install into /target/' during Linux Mint installation on an iMac

I have a Mid 2007 iMac, I've installed rEfind on the mac and the Linux Mint (Cinnamon 17.3) installer on an USB thumb drive . rEfind sees the USB thumb drive, sees grub installed on the key, I boot ...
2
votes
1answer
5k views

unable to boot my Mac book after file vault 2 activation

after activation of file vault 2 I am unable to boot my computer, the apple sign turns into a prohibitory sign with a spinning circle beneath it , that spins forever. I really need the data on this ...
7
votes
4answers
1k views

How do I know if I need a new hard drive?

I just received a MacBook Pro from somebody else because it was running too slow. Booting up takes about 4 minutes. I have tried formatting the drive and reinstalling the operating system from ...
1
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1answer
24 views

Holding Down Control at Startup Manager (Boot Disk Selection) Screen

I noticed that when I hold the control key at the screen where you select a boot disk (the screen obtained from holding down option at startup), the straight arrow below the selected boot disk turns ...
1
vote
1answer
25 views

Mac Pro 2,1 updates and firmware question:will the firmware from the older work with the newer and vice versa?

I'm pursuing an alternative boot drive so i can explore a yosemite or elcapitan environment from my old mac pro 2,1 currently in the last version of snow leopard. (with legally purchased soft ware ...
3
votes
1answer
273 views

Does Windows, running on latest Apple computers, see boot disk partitioned as MBR or GPT?

From my understanding, the newest apple computers boot Windows in EFI mode. Traditionally, Windows has seen the boot disk as an MBR partitioned disk. In fact, the boot disk (i.e. /dev/disk0) has aways ...
0
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1answer
103 views

MacBook Air charging light stays amber and does not go green and machine does not boot or even chime

I have an 11" MacBook Air 6,1 from mid 2013 that I found discarded and had restored but now seems dead again. I got the machine with a broken screen backlight and missing SSD. I took it to the Genius ...
0
votes
1answer
129 views

Installing El Capitan from a bootable DVD

I have El Capitan on a bootable DVD. I restart my Mac and hold the option key until the disks come up and I choose EFI Boot (name of the disk is different than what it shows at the time of booting). ...
0
votes
1answer
34 views

Bootcamp cannot find both systems at startup

Something strange happened: I closed my macbook pro while using windows 10 When I opened it again it didn't wake up for a while so I forced it to shut down by pressing the power button for 10 ...
0
votes
1answer
92 views

How to check if secure boot is enabled in OS X?

I got this question is secure boot enabled? but I do not know how to check it in my Macbook Air 2013-mid with El Capitan 10.11.4. How to check if security boot is enabled in OS X?
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0answers
25 views

Mac OSX EFI problems, urgent help needed!

So, I recently did an update on OSX, booted my computer up and I discovered that I the update replaced my EFI boot rom and the SMC with the incorrect SMC, so now I can't use my battery and the ...
0
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0answers
12 views

iMac 24" 2.16 ghz core2duo

I'm trying to install Snow Leopard but iMac won't boot from the install disk. I've also tried booting from a flash drive with Snow Leopard Install on it with no luck. It also will not boot from the ...
0
votes
0answers
10 views

iPad mini won't boot

My iPad Mini's battery was drained and I tried to charge it. When I came back I tried to open it but neither the apple logo and charging sign appeared. I tried to press and hold the home and reset ...
0
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0answers
54 views

iMac A1208 - Mac OS X 10.4 Install Problem

I'm a French user and I have a iMac from 2006/2007. I have changed the logic board. It's ok, but i want to do a fresh install of OS, (10.4), but the optical disk is KO. I have the official CD (but it ...
0
votes
1answer
22 views

MacBook Pro (2006, A1150) fails to boot

My MacBook Pro (2006, model A1150) fails to boot beyond the white screen AFTER the screen with the Apple logo and spinner. I have tried: Resetting PRAM (doesn't work) Resetting SMC (how can ...
2
votes
4answers
42k views

MacBook Pro flashing question mark but I can't repair because hard disk not found in disk utility

Today my MacBook showed up some wheel of death and I waited and waited and then after a long time (10 minutes) decide to force shutdown. Ok, I know its not a good idea but I've done this before and ...
0
votes
0answers
35 views

How to get rid of the boot gong sound without OS X Installed?

If you google it, there are tons of solution with writing to NVRAM from OS X Terminal, but on my MacBook Air I deleted OS X in favor of Windows. Edit: I already got the tip here to start the Apple ...
0
votes
1answer
122 views

Can't boot into OS X Recovery Mode

I would like to I've recently installed Debian Linux on my Macbook, which required repartitioning the hard drive. I now can't boot into Recovery Mode. Holding down Command+R on boot brings up ...
0
votes
1answer
23 views

Is it possible and relatively easy to boot a 2013 MacBook Air from an external drive?

Given a MacBook Air that's working but with dead display and SSD, can I use it as a desktop-only machine with an external monitor and external hard drive? The guy at the Apple Store Genius Bar this ...
3
votes
1answer
65 views

Run nrpe on boot w/o a logged in user

Running a Mac mini with server app. (El Capitan 10.11.4 & Server.app 5.1) Installed Xcode, brew, and nrpe via brew. Works fine as such. It's not sensible to have to remote desktop to it and log ...
0
votes
1answer
162 views

How to fix bootcamp boot after removing hybrid MBR

I've updated bootcamp to Windows 10 which should support GPT with protective MBR without any hybrid tricks. I have 6 partitions on disk0 so hybrid MBR is also inconsistent with GPT and it's somewhat ...
0
votes
1answer
50 views

Can not boot MacBook Pro 2011

I have a MacBook 2011 running OS X 10.11.5, 16GB RAM, 512GB SSD Drive. Today when I am restarting my computer, I accidentally pressed Cmd+R while booting. Now I try and restart my computer, it shows ...
2
votes
0answers
45 views

Bootcamp: How do you reboot from Windows to Windows via script in OSX El Capitan?

I'm asking this because I think it would be incredibly useful to myself and other Bootcamp users. I currently have my default boot drive set to restart to my Mac partition and already have a script ...
9
votes
5answers
2k views

What would it take to make an iPad support multiple user accounts?

As a mobile computer, the iPad is very personal, but it also begs to be shared. And that's a problem. I don't want my friends to be able to check my emails or delete my high score when they play with ...
0
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5answers
664 views

Error Installing OS X El Capitan on Early 2008 Mac Pro from USB

I am trying to install OS X El Capitan on an early 2008 Mac Pro. I wiped the hard drive on the Mac and followed this tutorial to create a USB boot drive with El Capitan using a Macbook Air running El ...