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

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0
votes
4answers
24 views

How to extract files from a broken non-bootable OS X without reinstalling OS X?

What can I download/install onto a USB drive, have it boot off that USB drive and then copy the files I need to another USB flash drive? The error message I get when booting is "Missing Operating ...
7
votes
4answers
237 views

How long to hold key combinations when booting mac

I can't believe no one has ever asked this, but I can't seem to find it: How long should you hold down key combinations, such as Command + S, while your Mac is booting? I can get this iMac to boot ...
2
votes
1answer
17 views

Kali Linux auto boot

I have just installed Kali Linux in a separate partition of an iMac with wireless keyboard and mouse and with rEFInd. When I turn on the Mac it boots into Kali Linux automatically and doesn't ...
0
votes
0answers
17 views

iPad stuck in boot up loop. 4013 error after multiple restore attempts

After speaking with Apple's tech support, and having them perform a data capture on my machine, I sit stuck with an iPad that won't boot up. I've attempted all trouble shooting listed here. I've ...
1
vote
1answer
50 views

Problem after cloning a Mac with dual boot

I bought an SSD to upgrade my MacBookPro (late 2011) and have cloned the HDD with CloneZilla. I have dual boot with OS X Yosemite and Windows 7 Pro. However, now on the SSD, I can't boot into the ...
0
votes
2answers
56 views

How to make a bootable external hard drive and boot up a Mac?

I have an iMac 27 inch, and one summer the room temperature was up to 40C, and I came home that day, and the hard drive was really slow. I then rebooted the machine and it took something like 8 ...
1
vote
2answers
14 views

Blinking folder icon - safeboot, recovery hd does not work

When I try to start my MBP early 2011 with Mavericks OS installed I get a blinking folder icon. SMC reset, PRAM reset did not resolve the issue. The MBP does not boot into the safe mode too. When I ...
2
votes
1answer
21 views

White prohibitory sign on Startup

Have the white prohibitory sign when trying to boot up MBP Retin 13" late 2012 running Yosemite. Have tried resetting PRAM (cmd + alt + p + r) and disk utility has been to no avail so far. Have tried ...
0
votes
0answers
89 views

Installing Windows 7 on a MacBook Air, Early 2015

The issue: I have an issue with an MacBook Air that I need to install Windows 7 on. The problem is that this MacBook model does not support Windows 7 in Boot Camp. So I thought that I should instead ...
0
votes
1answer
36 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 ...
-1
votes
2answers
41 views

Why can't I boot to Disk Utility (iMac A1418) - It displays a lock and a password field?

Someone showed me their iMac that they recently bought second-hand. It boots normally to the login screen with the PIN (EDIT: it is a PIN and NOT a passcode; the message reads "Enter your system lock ...
0
votes
1answer
34 views

White Screen Hang Mac Pro

Reading related posts it seems I have a blend of other's issues. But the final blow was plugging in a nextbook tablet to download some pdf files, and THEN I booted the old Mac Pro 2008 with Yosemite ...
0
votes
1answer
35 views

Reboot fails after failed disk erase when restoring from Time Machine

I have an Early 2013 Macbook Pro Retina 15" with 512GB of SSD storage. My update to Yosemite 10.5 failed for some reason and I was left with an unbootable system and severe file system errors that ...
2
votes
2answers
349 views

Bootcamp Windows 7 installation, USB is not recognized only on bootloader

I'll abstract my question. I'm using MacPro4,1 Early 2009. And I'm trying to install Windows 7 Professional x64 SP1. (I'm using Yosemite 10.10.4, and Boot Camp Assistant is 5.1.4) My Mac has 2 HDDs, ...
0
votes
0answers
23 views

Late 2013 13" retina MBP freezes when using its own display (OS X 10.10.3)

I am having some serious problems with this machine. Its own display remains dark, but when attaching another display, I see it load the Apple logo on a black screen and then freeze on the white ...
2
votes
1answer
91 views

How to install Windows 8 on a MacBook Pro with OS X Yosemite, using Boot Camp, without a USB drive or DVD

The title covers most of my question. I am relatively new to the Mac world, and came across Boot Camp, which can dual-boot Windows, which seems pretty cool. I have read through many Boot Camp guides, ...
0
votes
2answers
194 views

Why would my iPhone 6 be stuck in a dead battery boot loop?

Okay, so I have a problem. My iPhone 6 died (it runs a non-jailbroken version of iOS, I used it as a test device for development applications, but I didn't do anything crazy with the firmware of the ...
-1
votes
0answers
36 views

Transfer system boot to external SSD (iMac)

I'd like to use SuperDuper to copy an existing internal boot volume to an external SSD (to see if I get an appreciable performance boost). However, my internal drive is 1TB (most of which is in use) ...
0
votes
0answers
18 views

RE:Boot hangs on grey screen

I followed the advice from this page Boot hangs on grey screen (even when booting from USB drive with fresh OS X install) It worked though as I could log in my system but the graphic is dull and slow ...
0
votes
0answers
27 views

iMAC MC508LL/A new hard drive, cannot install from disc

I was trying to repair a friends iMac with a failed hard disc. I bought a 500GB 850Evo SSD to replace the failed hard disc and installed it using the OWC kit. Now I am trying to get it started up. I ...
0
votes
0answers
29 views

MacBook Pro Won't Boot. No Video. No Chime

I have a 2010ish MacBook Pro that was working fine this morning. I installed a new version of the Dropbox client and rebooted. It now won't boot up. No video, no chime. It does, however, hit the ...
0
votes
0answers
12 views

Early MacPro 2009 keeps needing SMC reset

My MacPro keeps needing to have its SMC reset to stop the video card putting my monitor to sleep when it switches from the logo screen to the desktop image during boot up. The problem seems to have ...
0
votes
0answers
39 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 ...
0
votes
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
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
votes
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 ...
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
0answers
115 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 ...
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
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 ...
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 ...
0
votes
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 ...
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 ...
-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 ...
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 ...
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: ...
1
vote
1answer
163 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
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
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. ...
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 ...
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 ...
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 ...
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 ...
1
vote
1answer
306 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 ...