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

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0
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0answers
38 views

Startup very slow (10.6 / 10.9)

My dev workstation (MBP 2012, 2.5Ghz i5, 16Gb, 500Gb HDD) is incredibly slow booting up to the point I'm terrified of rebooting it. Every now and again it crashes or refuses to wake (maybe once every ...
1
vote
2answers
10k views

Macbookpro can't recognize bootable usb at boot time?

I have an old macbookpro: Model Name: MacBook Pro Model Identifier: MacBookPro6,2 Processor Name: Intel Core i5 Processor Speed: 2.53 GHz Boot ROM Version: MBP61.0057.B0F I created a ...
1
vote
3answers
4k 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 ...
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votes
1answer
2k views

Mac Pro hangs at startup showing white screen with spinning pie wheel

MacPro 1,1; lion? startup hard drive failed (with loud buzzing). Removed bad drive, installed replacement, inserted Lion USB drive, verified new drive using the Lion usb drive, started installation ...
0
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0answers
27 views

MBP dramatically slowed over the weekend

I have my MBP (13" early-2011 i7) attached to an external screen (not in clamshell mode). I'm not sure what happened over the weekend but the MBP has been possessed somehow; first off it wouldn't wake ...
2
votes
1answer
43 views

How do I recover my data/OS after accidentally writing over my main hard drive with an img file using dd? [duplicate]

I accidentally wrote over main hard drive with an img file using dd. This thread is the similar but my case is that I accidentally wrote my main hard drive. I have a late 2013 MBP 13" Retina 256GB ...
0
votes
1answer
761 views

MacBook Pro stuck in gray screen when booting

I've got a Late-2011 15" MacBook Pro stuck in the gray screen when booting AFTER login. I've tried removing the drive (it's non-retina) and booting from a working bootable Yosemite installer, no luck. ...
0
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3answers
4k views

Macbook Pro 13-inch stuck at Gray screen with apple logo and wheel

I have a 13 inch Macbook Pro, early 2011 with its original OS. I came to a point where its battery needs to be replaced, and I can't use it without using its charger/adapter. One time, I accidentally ...
1
vote
1answer
123 views

Weird LCD / Boot problems on my MacBook Pro Late 2011

My Mac is a MacBook Pro Late 2011 model with the 15 inch screen. It began all with me, connecting my Nexus 5 to the Macbook. I imported some videos with iTunes (yes, iTunes popped up automatically ...
0
votes
1answer
122 views

MacBook Pro Yosemite hangs during boot

My MacBook Pro froze earlier whilst using it, so I did a hard reboot. Ever since it won't boot up. It gets to the Apple logo with the white progress bar but the progress bar won't move past 20%, I've ...
0
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0answers
33 views

Can I boot from any USB DVD drive or only the SuperDrive

I went to Curry's today which is a electronics retailer and bought a Mac mini. I wanted to buy a HP DVD Drive to boot from (for system repairs, Linux, Windows, GParted) I asked the store assistant if ...
0
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1answer
46 views

Macbook Pro (mid 2010) shutting down upon boot up

Here is my question. My macbook pro has been acting crazy for a while, shutting down unexpectedly daily. Every once in a while it will work for a day or two but eventually will start shutting down ...
0
votes
1answer
77 views

No bootable disk when booting Windows after installing Linux on Mac

That must the weirdest title you've read in a long time. I have a MacBook Pro Mid 2012, I installed Windows 7 with Bootcamp and all was working fine. Last night I installed Kali Linux with a bootable ...
1
vote
0answers
33 views

How to boot OS X with network devices in promiscuous mode?

As OSX no longer allows ifconfig en0 promisc and sees that as a bad value and does not set the device flag, what other options are there? I'd like to be able to boot and have both my Airport/WiFi as ...
2
votes
2answers
1k views

Windows boot camp option missing in Startup Disk selection

I have a Mac Pro (early 2009) running Yosemite 10.10.2, all up to date. Yosemite is installed on my primary SSD (I have 2 additional magnetic drives). I use Boot Camp, and have Windows 8.1 installed ...
0
votes
1answer
97 views

iMac mid 2010 running slow

[Specs of the iMac, the iMac already have 8GB(Should be enough to handle Yosemite)] [1]http://www.everymac.com/systems/apple/imac/specs/imac-core-i3-3.2-21-inch-aluminum-mid-2010-specs.html#macspecs1 ...
0
votes
0answers
114 views

My iMac hangs when I try to boot from a USB | EFI Boot

I have an iMac (iMac 8,1) and I am trying to install Windows on it. I used bootcamp to create all required parts and got to the part where it rebooted. I got the "No bootable USB devices" so I shut it ...
2
votes
0answers
130 views

Can I keep my Boot Camp partition when moving to a larger hard drive?

I just bought a 512 GB hard drive to replace my 250 GB hard drive, which currently has a Boot Camp partition (pretty vanilla, just running a standard Windows 7 install). I was planning to just clone ...
0
votes
0answers
56 views

Booting in safe mode or Repair if no keyboard synchronized

We have a Yosemite iMac that won't boot, it reboots in the middle of the loading bar with the Apple logo. Said iMac uses a Logitech bluetooth keyboard, and even if I press Shift or Cmd + R it won't ...
0
votes
1answer
114 views

Cannot initiate Windows 7 install on MacBook Air bootcamp

I use the latest Yosemite version on MacBook Air, I am trying to install Windows 7... I start bootcamp, I select the first two checkboxes [X] create windows 7 install disk [X] download support ...
10
votes
5answers
153k views

Create a Bootable Windows USB from a OS X to work on a PC

What I need to archive is Create a Bootable usb drive from Windows 7 iso image using a Mac running. Use the flash drive to boot and install windows on a PC (not Mac) What I'm looking for is an app ...
2
votes
1answer
3k views

OSX Froze, Fails to Boot in any Configuration

In the middle of working like a charm, my MBP locked up. After a bit, I did a hard power off. Here's the timeline since then Reboot. Got to user screen just fine, logged in. Applications all started ...
-1
votes
1answer
69 views

Is it possible to tell if a Macbook hard drive was booted internally versus externally (usb, firewire, etc.)?

Is it possible to tell from system.log or other logs whether a macbook pro hard drive was booted internally or taken out and booted externally (from USB, for example) ? I'm thinking the "BSD root" or ...
3
votes
1answer
3k 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 ...
3
votes
1answer
41 views

How can I try to boot a completely stuck Macbook Pro?

I have a retina MBP that according to my mum was working last time she put it under charge (with 15% left). However, as of now, I get no reaction at all after pressing the boot key. The screen stays ...
0
votes
0answers
34 views

Is there any way to reattach an 'orphaned' Windows installation?

I have a Windows installation in a partition on my hard drive. The problem is, it's not showing up when I startup holding alt. I installed Windows through VirtualBox, linked to a physical partition ...
1
vote
1answer
162 views

Interpreting Mac logs: was this computer accessed or just booted up normally?

UPDATE: what it looks like based on your responses is that this log shows a NORMAL boot without any need to login into an account with a password. But my computer 100% had an ADMIN ACCOUNT and ...
0
votes
0answers
63 views

What causes 5 pink bars on 27" iMac (2011)?

I've got a 27 inch iMac made in 2011 that displays 5 pink vertical bars on the screen. It won't boot properly. I ran the Apple Hardware Test and it came up clean. Machine Specs: Apple Subfamily: ...
0
votes
1answer
66 views

Mac OS X startup manager always appears (option key inverted?)

I set up a fresh install of OS X 10.7.5 on a mid 2007's MacMini2,1 and installed my personal stuff like some components via Homebrew. After a few restarts it stopped booting automatically into my OS. ...
3
votes
1answer
3k views

Macbook boots up to grey 'prohibited' symbol

I'm having an issue with my '09 13" Macbook Pro. When I boot it up, it seems to be booting normally until about thirty seconds in, when the Apple symbol is replaced with a kind of 'no-smoking' symbol, ...
0
votes
0answers
18 views

Macbook Air Mid-2012 not booting

A day ago I got a message on my Mac that It's running out of space, so I ran a program named Omni disk sweeper to show me some files I can delete. I vaguely remember it showing me some temporary files ...
0
votes
0answers
42 views

Macbook pro crashed after loss of power. Fixed a few problems, but still cannot boot

We have a 2010 Macbook Pro, and a few days ago he had it off the power connection, and it lost battery power. It shut down, and when we hooked the cable back up, it would show the apple logo, and have ...
0
votes
0answers
43 views

Windows 7 partition on a 2013 iMac won't boot

The Windows 7 installer doesn't support my USB controller, so I'm unable to use my keyboard and mouse in the installer. This prevents me from using any tools on the installer to fix the boot process. ...
0
votes
2answers
1k views

SSD w/ brand new clean in stall of Yosemite fails to boot

I've just installed a new version of Yosemite on a third party SSD (Crucial). When I boot it up it hangs on a gray screen. Steps that got me here: Connect SSD to Macbook Pro (with existing HD) ...
0
votes
0answers
17 views

Can't boot after graphic error

Specs: MBP 15-in late 2011 running Yosemite 10.10.3 Background I have an external monitor that I've been using for about a year, but recently the Thunderbolt-to-HDMI adapter I have has been giving ...
0
votes
0answers
74 views

Dual boot Linux Mint 17.1 with OS X Lion

I have a 13' MacBook (2007, hw.model: 2,1) running OS X Lion (10.7). I wish to dual-boot Linux Mint 17.1 alongside OS X. I created a Partition for Linux, and have also installed rEFIt (0.14). I have ...
1
vote
0answers
45 views

Macbook pro 2010 lost power, now wont boot

Trying to help a friend avoid the high fees at the Apple Store. He has a 2010 Macbook Pro, and a few days ago he had it off the power connection, and it lost battery power. It shut down, and when he ...
1
vote
2answers
7k views

Mac wont boot and fan runs high

My Mid 2013 macbook pro recently will no longer boot. I was using it normally (no excessive use) and then all of a sudden it just went black and shut off immediately. I can no longer boot it (I got it ...
3
votes
4answers
3k views

Installation stuck at grey boot screen on Macbook Pro 4,1 (Early 2008)

I would appreciate any help you guys can give me since I would really like to upgrade my laptop to Mountain Lion. Computer: Macbook Pro 17" 4,1 (Early 2008) RAM: 4 GB RAM Hard drive: 128 SSD Hard ...
-1
votes
2answers
64 views

Unable to use gpt to restore efi partition

I accidentally deleted my efi partition, which I now know is bad news bears. I found a guide here to restore it without losing data, but even though I'm booting from usb and have unmounted all ...
1
vote
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
104k 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
49 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
votes
3answers
904 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 ...
3
votes
4answers
38k 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
8k 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 ...
1
vote
1answer
303 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 ...
2
votes
2answers
337 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 ...
2
votes
2answers
557 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 ...
0
votes
0answers
23 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 ...