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

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0answers
130 views

System restore: an error occurred while preparing the installation

I bought a used mac mini on ebay, the guy who sent it to me completely formatted it, leaving only recovery partition. Now when I boot the recover, I see 4 options, one of them is reinstall the OS. ...
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0answers
38 views

MBA with Syslinux on USB

I'm trying to boot a Linux kernel built with Buildroot from USB on my Yosemite Macbook Air. I have followed the first steps in Failed To Install syslinux on USBDRIVE with Mac OS X, i.e. - DiskUtility ...
2
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1answer
161 views

Is a bootable USB drive with Yosemite OK for different macs?

This might be obvious, but probably worth a question: I took my MBP (Early 2011 15"), downloaded Yosemite and created a bootable USB device from which I later clean-installed the OS. Can I use this ...
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1answer
112 views

Unable to properly boot Power Mac G5 running Debian without a screen connected

I’ve got Power Mac G5 running Debian 6 in headless mode as a media/home server. When booting it without an attached screen, the fans ramp up from the idle speed to maximum over a couple of minutes. ...
1
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0answers
45 views

MacBook Air boots into wrong partition

I have two partitions created, one called "Yosemite" and the other is my default 10.6.8 partition "Macintosh HD". I successfully installed Yosemite onto the "Yosemite" partition, but when I try and ...
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2answers
7k views

Yosemite won't boot in safe mode with Shift held down

I'm investigating some slowness with my late '13 rMBP which I upgraded to Yosemite on Sunday. Problem is, I can't boot into safe mode by holding the Shift when restarting or powering up. I tried ...
3
votes
2answers
4k views

OSX Partition won't mount. Permissions seem wrong

OS X was spinning and spinning when trying to shutdown so I held down the the ⌽ Power button to force shutdown. Current Situation: I cannot boot to OS X directly, I first have to boot to single ...
3
votes
1answer
58k views

Can't start up MacBook Pro from OS X install discs

I wanted to re-install my mid-2010 15-inch MacBook Pro (Intel Core i7 2.66 gHz 8 GB 1067 MHz DDR3 RAM) which is currently running Mac OS X 10.6.8. I inserted the retail Mac OS X 10.6 install disc, ...
4
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4answers
218 views

Mac Won't Boot. Help needed

I use top-notch MBPRO15 Late 2011 with the latest OSX and all the recent updates installed. I had booting problems before which I managed to solve through command+option+P+R. I'm not sure what exactly ...
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0answers
473 views

MacBook Pro won’t boot up after putting the bottom case screws back in place

I'm kind new in this world of Apple, and I have an Intel-based Mac that suddenly had the hard drive fail. So I make a Mac OS X USB flash drive, and realize that the old hard drive died since “Disk ...
1
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0answers
773 views

Yosemite displaying the blue and grey screen of death

I have a late model 2011 MacBook Pro, and I upgraded to Yosemite two weeks ago. Yesterday I was working in After Effects on some pretty big movie files when the laptop screen just went black. Now ...
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1answer
123 views

Key to boot from USB on Ubuntu MacBook Air

Recently, I removed OS X from my MacBook Air and installed Ubuntu 14.04 on it. I have been trying to install Debian during last week, but I don't have idea what's the key to enter into 'BIOS boot ...
1
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1answer
121 views

Fix formatted GPT in SSD

I accidentally formatted my SSD's GPT while formatting a USB in Linux's gparted. Now, when running gpt in Mac's command line, this is how my SSD looks like: My-MacBook-Pro:~ user$ sudo gpt -r show ...
0
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1answer
84 views

Why don't Windows 7 bootable sticks start on MacBook?

On Macbook air ~2014 when I created the bootcamp partition and the Windows bootable stick, it made a stick that can start an install just fine on Windows computers. Why doesn't that bootable stick ...
1
vote
2answers
3k views

Macbook Air intermittently can't find startup disk

About six months ago, my Macbook Air started having a strange issue where it would often not be able to find the startup disk, giving me the flashing question mark. Initially, I was convinced the hard ...
2
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3answers
9k views

Yosemite OSX iMac reboot progress bar stuck at 50%

My son went out of town and, upon returning, turned on his iMac. It rebooted and went into the progress bar typically showing during updates. It goes to the 50% mark, fairly quickly but then stayed ...
0
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2answers
332 views

Can I boot OS X or Windows Boot Camp from an external USB Type-C drive?

Currently I boot OS X and Windows Boot Camp from an external Thunderbolt HDD. LaCie just announced a new external USB-C (USB 3.1) hard drive enclosure. Will I be able to boot OS X or Windows Boot Camp ...
2
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3answers
2k views

Is it possible to boot from an encrypted external hard drive?

If I have an external hard drive with a bootable cloned backup (via SuperDuper) - if I encrypt it with the Finder will I still be able to boot from it if necessary? Are there any solutions to enable ...
10
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2answers
3k views

How to disable single-user boot (command S)

By default, Macs are extremely insecure if somebody can get physical access, as they can simply shut it down, press the power button, hold command-S, and there, they get root access in 5 seconds. Is ...
2
votes
1answer
5k views

Dual boot Ubuntu 14.04 on a MacBook Pro

so after a few hours of Google searching and too many headaches with a broken GPT, I've turned here. I have a 2012 MacBook Pro (9,2) that I want to dualboot OS X 10.9 and Ubuntu 14.04 on. I've read ...
2
votes
2answers
1k views

Stop sign at boot - new SSD

I've got a mid 2012 MBP 13" in which I inserted a brand new MX100 in the place of the old HDD. I've put the old HDD in a case in the superdrive place and tried to install 10.10 but the install failed. ...
2
votes
1answer
38 views

Can I make a bootable drive for mid 2010 MBP with a Windows computer?

I have a mid 2010 Macbook Pro running Yosemite that I foolishly did a reset on while it was connected to an external monitor that was designated as default in settings And connected to a USB keyboard ...
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0answers
167 views

Power Mac G5 doesn't boot/black screen

I have a Power Mac G5 (Model No: A1047 EMC 1969C). My problem is that it doesn't properly boot anymore when powered up. When I'll press the power button, the white LED next to the button will ...
6
votes
4answers
18k views

Can you boot a MacBook Air from a USB 3 external hard drive?

Macs have long been able to boot from external FireWire hard drives. I don’t think they’ve been able to boot from external USB 2 drives though. The new MacBook Air (2012) has USB 3.0. Can it boot ...
2
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0answers
296 views

Broke Boot Camp while trying to get a triple boot

I'm running Yosemite, up-to-date on a mid-2012 MacBook Pro. I removed the optical drive, moved my internal HDD to its location and placed a new SSD in the original HDD's location. This has been great ...
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0answers
65 views

Internal HDD works with pc but not mac. MBP

I had bootcamped win 7 on my mac a while back until one fateful night I was hit with a bluescreen. When I attempted to restart I received a no drive recognized error. Since then I have done everything ...
0
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2answers
318 views

How to run a sudo command on mac? .. problem with mysql server

I 've installed mysql server with brew, and i need to run manually this command each time my computer start to make it work with an application that I can't edit. sudo mkdir -p -- /var/run/mysqld/ ; ...
1
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0answers
268 views

Mac Pro 2008 Refuses to Boot

My Mac Pro 3, 1 began rebooting randomly one day and the next it wouldn't come back on. Pushing the power button results in a fan clicking in to life for half a second and then all power is lost. The ...
1
vote
1answer
218 views

Flashing question mark, low hard drive space

When I booted my Mac last night I got a flashing folder against a gray background. The computer started fine this morning, but when I closed the lid and opened it up again I had to reboot, and now ...
1
vote
0answers
91 views

How to Hide All users from fresh boot With FileVault 2

With System preferences>Users & Groups> Login options> display login window as "Name and Password" normally you need to type out the user name and password to sign in. With FileVault2, when ...
0
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0answers
242 views

Installing Windows on an Early 2011 MBP w/ swapped out SSD… major roadblocks

My problem started a few days ago when after installing my brand new 250gb evo ssd I decided having a windows partition would be nice. I had previously had this setup before having the ssd whenever I ...
1
vote
1answer
1k views

Can VirtualBox prevent Mac OS X Yosemite to boot properly?

After a few days of good experience with Yosemite, my Macbook pro cannot boot anymore. After 30 or 40% of boot, it just restarts. Here are what I did to fix it: Booting to single-user, runnign fsck ...
3
votes
4answers
2k views

Why does RAID 1 “Mirroring not provide performance improvements”?

I have always used Software RAIDs, either Apple-provided, or via SoftRAID, etc. I am about to re-zhuzh my arrays and decided to do a little research beforehand… and On Apple's site, there is a ...
0
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1answer
613 views

Boot Camp OS startup selection not available with Windows Alt

I am using iMac (Yosemite) and Logitech K800 wireless keyboard http://www.logitech.com/en-us/product/wireless-illuminated-keyboard-k800 (specifically the Finnish version of it). When I press Alt on ...
0
votes
1answer
368 views

MacBook Pro early 2011: sound loop, black screen

Over the last week I have had four similar incidents: When I played something on YouTube, the audio just loops for a few seconds, and then either the screen freezes or a black screen will appear. ...
0
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0answers
450 views

Bootcamp fail stuck at no bootable device (hold option not working)

I've been trying to find an answer to my problem all day with no luck. I tried installing windows 7 via bootcamp this morning. I accidentally created the partition before creating a bootable usb ...
0
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1answer
210 views

Folder with Question Mark On Startup, Don't Know the Firmware Password

So my buddy's macbook one day just booted up with a folder with a question mark in it. Its an old laptop from work, which he doesn't work at anymore. I've been trying to help him out, but I've ...
1
vote
1answer
173 views

MacBook boots automatically when opening lid. Feature or problem?

When my 13" Retina MacBook running Yosemite is powered off and I open the lid, it immediately starts booting up... without pressing the power button. Is this a new feature (maybe part of Yosemite) or ...
1
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0answers
991 views

How do I unfreeze my iPod Nano 4th Gen?

tl;dr -- My iPod hangs on the boot screen (black background, silver apple logo). When I try to restore it (on both my Virtual Windows XP and on a Mac laptop), it'll restore fine, but when it reboots ...
2
votes
1answer
138 views

MacBook Pro Mid 2012 startup chime from right speaker only

After installing a ssd into my Macbook pro mid 2012 (not retina), i noticed that the startup chime is coming only from the right speaker. (I am not sure if it was always like that or if its because of ...
0
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2answers
318 views

Mouse and Keyboard on MacBook Air mid 2009 don't work partially

My MacBook Air mid 2009 worked for 3 months without any problems on Yosemite. Two days ago the built in mouse stopped working along with the built-in keyboard. Right after it woke up from sleep mode ...
2
votes
1answer
217 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 ...
5
votes
1answer
2k views

How to start to recovery mode in a Mac OS X VM in Parallels?

Is it possible to start into Recovery/Internet recovery mode in a virtualized Mac OS X in Parallels? It would come in handy to take screenshots of those UIs or running apps to exemplify some steps ...
0
votes
0answers
98 views

Trying to boot brand new Mini from SuperDuper Backup - circle with line through it

Our Mac Mini went belly up, so I just got a brand new one. I had a nightly scheduled super duper backup to an external drive, which works fine on other Mac's (i.e. I can boot it up and run) On the ...
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3answers
2k views

Yosemite boot times

I have a brand new iMac 3.5GHz i5 with 8GB of RAM with a non SSD drive. When I boot Yosemite it takes 52 seconds from the gong to the desktop, most of which is spent with the progress bar. This seems ...
2
votes
2answers
2k views

Macbook Pro.[Mid-2012] Sound isn't working

Suddenly, My MBP sound isn't working. I have tried couple of way to resolve the problem but nothing is working. Here is some of the screenshot: No, input or output sound. I would like to know 1) ...
1
vote
0answers
522 views

Unable to Open /var/db/BootCaches/PreheatedUser/Merged.playlist

Running Mavericks and Disc Utility and fsck report no errors. Safe Boot reports Unable to open /var/db/BootCaches/PreheatedUser/Merged.playlist. Found a tutorial (or three) recommending to enter ...
0
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1answer
73 views

Can't change startup disk iMac

Here is my situation: I've only the mouse paired with my iMac because I rent the keyboard to a friend. Unfortunately the startup disk is set to a fallacious Windows partition that don't want to boot. ...
1
vote
2answers
5k views

Macbook Pro boots successfully when using hard drive in USB enclosure but doesn't boot when connected internally

Apologies for the long question. I will keep it as simple as I can. Last week my Macbook Pro (13-inch, Mid 2010) started to act strange. It started when I tried to open Skype and received an error ...
0
votes
1answer
491 views

Shell script to boot OSX in recovery mode and execute another shellscript

I'm working at a University and we are restoring our Macs using Apples ars which works great. The process is to manually go to the computer - reboot it in recovery mode and then run the ars command to ...