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

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2
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1answer
28 views

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

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
521 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
votes
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
5answers
38k views

MacBook Pro can't boot: shows Apple logo then grey screen

There is a MacBook Pro from 2012 with Mountain Lion that won't boot. The Apple logo is showing, the spinning wheel and then it just goes to a solid grey screen. I've tried to hold Cmd+R while ...
1
vote
1answer
87 views
+100

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 ...
1
vote
1answer
2k views

No bootable device after failed Windows 7 installation via Bootcamp

While trying to install Windows 7 via Bootcamp on my MBP Retina today I really messed up. After getting into the drive selection in the Windows installation utility I deleted the other partitions (3 ...
0
votes
1answer
27 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
votes
0answers
13 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
votes
1answer
28 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
35 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
11 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
186 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
65 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
34 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 ...
3
votes
2answers
2k 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 ...
2
votes
0answers
110 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 ...
-1
votes
0answers
49 views

How to tell from logs if a MacBook was booted and logged in as “root”?

I'm trying to interpret a brief log from "system.log". This is the entire log for that day/session. The scenario is my MacBook Pro had a password-protected admin/login account. However, it appears ...
0
votes
0answers
15 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
46 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 ...
9
votes
5answers
134k 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 ...
1
vote
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
vote
1answer
7k views

MacBook Pro won't boot with new hard drive, but a different MacBook Pro will

So here are the details. My friend and I both have 13-inch Mid 2010 MacBook Pro's. Same processor and specs since they were purchased at the same time, but originally had 250 GB hard drives. His hard ...
4
votes
1answer
3k views

Macbook Pro hangs when booting into Boot Camp Windows 7

I have a 2011 Macbook Pro 15" 10.7.4 with Windows 7 installed in Boot Camp. A few days ago, I tried to boot into Windows 7 and it just froze after I selected the Boot Camp volume on the Select Drive ...
-1
votes
1answer
54 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 ...
2
votes
1answer
1k 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
35 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
31 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
87 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
24 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
40 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, ...
1
vote
2answers
17k views

Macbook Pro Crashing and Startup Failure

Firstly, some background information for the problem: My girlfriend's Macbook Pro had an issue that was annoying, but not fatal. Roughly once a day (but sometimes not for a few days, and sometimes ...
0
votes
0answers
13 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
33 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
26 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. ...
2
votes
2answers
3k views

Resetting MBR on iMac

I installed Ubuntu on my iMac (partially successfully) I had rEFIT installed but it did not recognize the Ubuntu installation. I removed the partition and rEFIT and now when I attempt to install ...
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
14 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
44 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
34 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
2k views

Upgraded to 10.9, but it broke my Windows 8.1 Boot Camp partition!

I just got Windows 8.1 set up via Boot Camp a couple days ago, and everything was working wonderfully. Today, I upgraded my Mac to OSX v10.9, as suggested by Apple. Nobody told me it would break my ...
1
vote
2answers
6k 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
30 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 ...
2
votes
1answer
3k views

Can't boot MacBook Pro 13" (mid 2010)

The problem occurred after installing the update SMC 1.6 on Apple - OS X Mountain Lion: First for a long time was a white screen and noisy cooler After the system battery icon was crossed out and ...
1
vote
1answer
18k views

a bad Shutdown resulting in a flashing folder with question mark

I was rebooting my MBP when i turned off abruptly, now when i turn on my Mac again i just see a Flasing folder icon with a question mark instead the Apple Logo. i have MacBook Pro 15" Late 2012 (Non ...
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
93k 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
37 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
704 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 ...