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

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2answers
3k views

Screen backlight does not turn on during bootup, but turns on when accessing recovery partition

I have a late-2011 15" MacBook Pro running Mavericks. I normally don't reboot my computer and can leave it logged in for days on end. I decided to reboot my computer and when it was booting, the ...
2
votes
4answers
94k views

How do I create a Mac bootable USB drive using Windows?

My MBA 2012 with OS X 10.9.4 Mavericks won't boot anymore - it simply freezes after the initial jingle. I already tried resetting NVRAM and SMC, but to no avail. I don't have any time machine backups. ...
1
vote
1answer
38 views

Macbook Air 2008 won't boot after error message asking to shut down due to low battery

Yesterday my Macbook Air (original), model: a1237 flashed an error message asking the user to shutdown due to low battery. Since it was not me, but my brother who was operating the macbook at that ...
0
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3answers
711 views

“You restarted/Computer restarted because of a problem” on wakeup, Evernote?

For the last few days I've been getting scared because of these messages that appear very frequently on wakeup, and almost always when I wakeup after a long duration. Sometimes it says "you restarted ...
2
votes
1answer
1k views

Unusually long boot time in non-verbose mode - early 2008 MBP + SSD + Mavericks

Inside my early 2008 MBP (15", C2D 2.4, 4GB, GF8600M) I installed a used Samsung SSD (128GB), did a clean Mavericks install and at first startup, I restored the Applications, Desktop, Documents etc. ...
2
votes
4answers
30k views

Macbook Pro not detecting bootable USB with Yosemite

I created a Yosemite boot USB, from the App Store version 10.10.1. When I hold option during Boot, the USB drive doesn't show up on the menu. I have an aluminium MBP, bought in 2009. It is the full ...
2
votes
3answers
7k views

Problems creating Yosemite USB bootable drive

I was trying to make a USB boot loader for Yosemite using this command sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled 2 ...
0
votes
1answer
153 views

Failed startup after 10.10. upgrade

After upgrading to 10.10.4 from 10.10.2, my Macbook Pro (late 2013) boots up to a blank screen with the mouse cursor displayed briefly every 10 seconds. Booting to safe mode and resetting the SMC or ...
0
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2answers
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. ...
2
votes
2answers
224 views

Can I stop my Macbook Pro booting into Windows automatically?

I've got my Macbook Pro (early 2015) set up with Boot Camp. Normally, when I switch it on, OS X starts. But I can press Alt/Option to get the boot menu, and select Boot Camp Windows from there. Once ...
0
votes
1answer
4k views

I can't boot into Windows 7 on Boot Camp

I have a mid-2009 MBP. A couple of years ago I swapped out the optical drive for an SSD, made the original hard drive a Boot Camp partition and installed Windows 7 on it. It has been a brilliant "best ...
2
votes
2answers
527 views

2008 MacBook (A1181) won't boot from battery

I have a 2008 13" (2.4GHz) white MacBook that will only boot from mains power. If you attempt to boot from the battery it's as if it's not even connected. Once you get even past the initial startup ...
3
votes
3answers
9k views

Cannot access vital boot options on Mac Pro with OS X Lion

I have this used Mac Pro (mid-2010) that I recently bought, that came with OS X Lion installed. It was apparently installed from an image because there are a lot of installed apps and, though there is ...
0
votes
0answers
21 views

Black screen every boot

I have a new 2014 MacBook pro. Since some days, I get a black screen for every boot. So I always pressed 'cmd + option + r + p' when the booting sounds comes and it works again. Any idea how I can ...
0
votes
1answer
85 views

2008 MacBook Air Can't Boot OS X Snow Leopard USB Install Drive

I have a 2008 MacBook Air (MB003LL/A / MacBookAir1,1 / A1237 / 2142), and I am trying to reformat it with OS X 10.6 Snow Leopard, using the retail install DVD image snowleopard_10a432_userdvd.dmg ...
0
votes
2answers
26 views

Dual-Boot Win7 and Apple?

First off, I have no idea what Apple calls their OS. I only use their iOS devices and I tried to avoid their computer OS as best as possible, however, I'm getting started in developing iOS apps. I ...
0
votes
1answer
98 views

OSX Yosemite bootable usb drive circle slash (“no” symbol)

I have a Late-2011 Macbook Pro (4GB RAM) that has been running slow for several OSX cycles, and since Mavericks it's been unbearable (spinning beachballs whenever you do anything). I tried upgrading ...
0
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0answers
75 views

Can't boot normal or from recovery HD

Yesterday my MacBook Pro 15" Retina stopped booting. I see the Apple logo and a progress bar which gets stuck at about 10%. What I tried so far: Booting in recovery mode - same, progress bar stuck ...
1
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0answers
16 views

Macbook Pro not starting after multiple drops.

I've found a 'cheap' Macbook Pro mid 2012 13" laptop for sale on eBay and it would seem to be a great bargain if I were to get it. Even with all the repair costs, about half the price of a fully ...
0
votes
1answer
29 views

Can't Boot from Snow Leopard anymore after having installed mavericks on an external HDD

I have a Macbook Pro running Mac OS X 10.6. I wanted to test how mavericks works on my computer so I downloaded the OS and then I installed on a external USB HDD. Everything work as expected. I can ...
0
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0answers
89 views

Prohibitory sign on Mac startup running Yosemite

I used disk utility today on my MacBook Pro running Yosemite to create a bootable USB. I don't recall touching the hard drive of my MacBook Pro at all. After I finished the process, I went onto Google ...
3
votes
1answer
121 views

Booting from another mac's hard drive

My Macbook recently developed a video card problem, and I got another Macbook, both running Yosemite (though perhaps different subversions). I got my old hard drive out and connected it to my new ...
1
vote
2answers
2k views

MacBook Pro Mid 2009 does not boot without resetting system management control (SMC)

Today i started my macbook pro and after some seconds it stopped working (just turned). I was not able to start it again. After some apple support search I found a page that described how to reset the ...
-1
votes
2answers
45 views

What is wrong with my mac?

Suddenly today my good old MacBook pro from 2012 won't start. I get the gray screen of death. I have tried safe boot, recovery boot and Internet recovery boot and it all results in a static gray ...
1
vote
1answer
2k views

cannot boot. volume disappeared from boot option after Disk Utility (GUI) repair

I have a 13-inch MBP with the latest OS X version. Problem Yesterday, I went to the Recovery Mode and performed Repair on my boot volume. I was not having a problem, but I just wanted to verify and ...
0
votes
0answers
36 views

Spotlight indexing every time system restart or boot

Every time I restart or boot my Macbook Pro 2015 running Yosemite 10.10.4 bought yesterday. Please help is this normal behavior for a newly bought Macbook Pro 2015 model to do? P.S. I don't have any ...
1
vote
3answers
3k views

MacBook Pro refuses to boot/recover, hangs at “white screen”

I am somewhat new to caring for Macs, but one has been left in my care and I have not been able to restore it to working order yet. Here are the symptoms: The MacBook Pro would hang with a "white ...
1
vote
0answers
40 views

Boot stuck at Prohibitory screen

I'm using Macbook Pro 2012 running Mac OS X 10.10.3 and earlier today, I was trying to install Linux on a USB drive through Terminal. I first converted the format with this: hdiutil convert -format ...
0
votes
1answer
69 views

MacBook Pro won't start up

This is a 15" 2010 model that came with OS X 10.6 and now has 10.10 installed. After turning the computer on I can hear the startup chime and the power adapter indicator light lights up. The Apple ...
0
votes
1answer
88 views

How can I get Windows to install in Legacy (BIOS) boot on my mid-2012 MBP

I've got a 13" mid-2012 MBP running OS X 10.10.3 Yosemite. I've recently repaved it with a fresh install and now I'm getting round to Bootcamp`ing it. I've installed Windows 8.1 in EFI boot mode and ...
0
votes
1answer
2k views

How to run Apple Hardware Test with broken keyboard?

mid-2011 13" MBA running Yosemite Coffee spill has left keyboard of mid-2011 13" MBA non-functioning. Even power button doesn't work, I boot by shorting the two solder points on logic board. I've ...
0
votes
1answer
56 views

Hard Drive Change SSD - Macbook Pro

My Macbook was slow, and then i've want to make it faster, it is a Macbook Pro from 2011 or 2012, can't remember it. I bought a Samsung SSD 850 EVO. Firstly what i did, was to take out the old ...
0
votes
1answer
1k views

Serious Boot / Sleep Problems

Two days ays ago I closed the lid of my macbook pre for the night as I have done for the last 2.5 years but when I opened the lid in the morning the screen didn't show. It seemed to be 'alive' (ish) ...
0
votes
0answers
50 views

Why does my MacBook Pro (mid 2010) not boot OS X 10.9.2?

My MacBook Pro mid 2010 does not boot anymore from the HDD with installed OS X 10.9.2. I came across this solution which is clearing the NVRAM, but my Mac keeps showing the Apple logo and a spinning ...
1
vote
1answer
132 views

Unable to boot into ElementaryOS on MacBook after PRAM reset

I installed ElementaryOS on a separate partition of my HDD. Not sure what happened but the audio in OSX stopped working after the installation. After trying everything else, I found resetting the ...
1
vote
1answer
8k views

Mac boots into log on screen quickly but takes long time to log into account

I just replaced the stock OEM hard drive on my 2010 macbook pro 15 inch with a Samsung 840 Pro SSD 256GB and installed Yosemite on it from scratch with USB (the first time i am using Yosemite). Now ...
0
votes
0answers
53 views

OSX intall usb key not detected

I've trying to reinstall a clean OS X Yosemite on a Mac Book Pro (mid 2013 model) for the past few days but had no success. I created a bootable usb drive using createmediainstall (as on this: ...
0
votes
2answers
195 views

How do I repartition my Mac to get rid of my dual boot setup?

I setup dual boot on my Mac (with Ubuntu) and want to get rid of it. The Disk Util GUI shows me: However attempting to remove the disk0s4 or disk0s5 partitions results in: Could not unmount ...
1
vote
2answers
37k views

What are next steps when fsck reports “could not be repaired after 3 attempts”?

My Mac Book Pro 13.-" doesn´t get past the grey booting screen with the apple and the spinning wheel (The loading bar appears but when it´s done nothing happens) I have 220 GB in one single ...
1
vote
1answer
41 views

Disk Utility works forever at trying to repair partitions

My computer froze yesterday while I was using a browser. I restarted and never got past a plain white screen. Finally was able to boot from a different drive and ran disk utility on my main boot drive ...
0
votes
1answer
41 views

Cannot press Shift+T in OS X

Since a few days, I am not being able to press T and any other key on my Wired Apple Keyboard. Nothing happens when I press Shift and T. Keyboard shortcuts like Cmd+Shift+T don't work. Cmd+T works. ...
6
votes
4answers
24k views

Boot into Mac from Windows after failed Bootcamp

Don't hate on me too much for this one... I put Win8 on my Mac Mini using Bootcamp, and all was well. I switched back and forth a couple times between the two with no problems. The problem started ...
0
votes
1answer
160 views

Slow Internet Mac Yosemite Recovery Doom (MacBook Air, Early 2015)

Product: MacBook Air(early 2015) with OS X Yosemite. The issue is, that I happen to have my Yosemite reinstalled, so I restarted my MacBook and at the sound of the chime(startup sound of Yosemite), I ...
2
votes
0answers
46 views

Why does my USB hub hide a directly attached drive from the boot menu? (post-Filevault)

I recently enabled FileVault on both my mid-2012 Retina MacBook Pro and my external USB drive containing a Carbon Copy Cloner backup. My external drive is attached directly to the MBP. I also have a ...
2
votes
3answers
318 views

Installation of Yosemite is interrupted by a white screen at ⅓ of progress bar

The loading of the installation from a Yosemite USB installer drive is interrupted by a blank screen about ⅓ into the progress bar. The same USB drive works on another (older) MacBook Pro. The ...
0
votes
2answers
160 views

MacBook Air won't start up, won't enter secure mode and repair in Disk Utility

Unfortunately some data was downloading and my Mac got stuck, so I forcefully power it off. After that, I couldn't enter the login screen, because the loading bar was stuck. I tried to enter safe ...
1
vote
1answer
24 views

Default ubuntu to boot in startup manager causes ubuntu to not work anymore

I have installed ubuntu alongside os x. I can start it by pressing the option key during startup and choose the correct disk. Everything works. Now I want to default the ubuntu disk. That works by ...
0
votes
1answer
20 views

SATA cable problem?

I have a MacBook Pro 8,2 (15 inch, early 2011) running Yosemite (with encryption enabled). I have a strange problem that seems to relate to my boot drive (Samsung 840 Pro SSD). The system runs great ...
1
vote
1answer
69 views

Why does my Mac Pro boot to black screen with third-party video card when holding Option key?

I have a Mac Pro 2012, and recently installed a new Gigabyte GTX 760 graphics/video card. I also have Windows 7 installed on this computer on my Bootcamp partition. When I attempt to start up my ...
0
votes
2answers
3k views

iPhone 5 stuck at Apple boot logo after screen replacement

My girlfriend smashed her iPhone screen. Being technically competent and after looking at YouTube videos of how to fix it I thought I would give it a go. After replacing the screen and moving the ...