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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2answers
19 views

2010 MBP 10.8.2 wont boot, stuck on grey screen spinning wheel,

Pretty please help. Here is the situation Purchased in 2012, no install disk, came with Mountain Lion. Never had any problems with it until a couple weeks ago when it froze when I opened the lid. I ...
1
vote
1answer
38 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 ...
0
votes
0answers
33 views

Mac with newer OS X installed no longer boots previous version

First of all I am aware of the fact, that Macs usually refuse to boot or install older version of OS X than they were shipped with. But this is not the case here. The long story: A few months ago I ...
0
votes
0answers
11 views

2011 Macbook pro - i7 750gb screen flicker

My mac did not boot after trying everything. I was planning to replace HDD but before that I took the HDD out and made it external and I could read everything without any issues. So thought its not ...
1
vote
0answers
115 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
72 views

Mac OS X mavericks not boooting in Lenovo z50-70 [closed]

I am trying to install Mac OS X mavericks on my Lemnovo z50-70. Bootable USB has been created using Unibeast by following ...
0
votes
1answer
13 views

Can the MacBook boot from a second HDD

If I was to install a SSD in my MacBook Pro (Mid 12) where currently the Superdrive is attached and continue to use the preinstalled HDD for other files, can I run OSX from that new drive? Or in ...
0
votes
0answers
27 views

What font is used to print a verbose mode boot?

When booting OS X in verbose mode (⌘V), the log is printed on screen. However, due to the font size and being unable to screenshot it means that I haven't been able to analyse the font very clearly. ...
0
votes
0answers
53 views

Mac mini early 2014: Enter startup manager using a windows (wireless USB) keyboard

Cannot enter startup manager or perform any other startup action on my mac mini. I tried installing Windows 10 (Tech Preview) alongside Yosemite. The mac mini automatically starts into Windows, ...
0
votes
2answers
92 views

MacBook Pro stuck on white screen after dual-boot adjustments

I wanted to have dual-boot setup on my MacBook Pro. So after searching for a bit, I found a couple of sites that offered a step-by-step explanation on how to do it using rEFInd. I successfully ...
1
vote
2answers
45 views

OS X takes long to boot after starting rEFInd once

I have an SSD in my MacBook (Pro 9,2; encrypted), and until recently, the apple icon appeared almost immediately after pressing the power button. Soon after that I would be able to unlock the disk ...
1
vote
2answers
123 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
0answers
60 views

How to disable OS X installer on boot?

TL;DR Have a MacBook Pro with (probably) bad GPU. Tried to install Yosemite OS X - after reboot, it hangs up on grey screen. Is there a way to disable Yosemite OS X (or any other) installer on boot ...
0
votes
0answers
27 views

MacBook Pro 15" Reoccuring Freezing Problem

I have a MacBook Pro 15" that has been having a reoccurring issue. It gradually starts to slow down while using it, starts freezing, and then will get stuck on the Apple logo loading screen after ...
0
votes
1answer
52 views

GRUB overwritten Refind/Mac bootloader - Unable to boot

Getting desperate here, need some help background: I have a late 2012 imac, running OS X 10.10 Also i had Xubuntu & OpenSuse running as secondary OSs I was using refind & everything was ...
0
votes
1answer
18 views

How to change boot login

How Do I change the user for the Boot login? I had changed my username recently and have deleted the temporary admin that has been made to change my username, but the Boot Login has somehow changed to ...
4
votes
2answers
77 views

Mac boot menu not showing up with different keyboards

I have a Macbook White from 2010. I have been using it for a while and everything works except the internal keyboard which is broken because of a tea spill. An external PC-keyboard (USB) is attached ...
1
vote
1answer
116 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
1answer
63 views

Booting from Windows USB Key Overwrote EFI - Mac No Longer Boots

I'm using a macbook pro running Yosemite. I was trying to create installation media to install linux on an SD card, and I used a USB key that had a bootable windows installation on it. I thought I had ...
0
votes
2answers
99 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 ...
1
vote
0answers
795 views

rEFIt boot changed after update to Yosemite

I was using rEFIt to work with Ubuntu with my Mac. After the upgrade to Yosemite I had a problem with rEFIt. I found the following solution on ubuntuforums.org but rEFIt still didn't work: cd ...
1
vote
3answers
548 views

Panic on boot, need to use single user mode (was: need to rebuild kext cache)

I'm getting this at every boot on one Mac: With some searching and asking around I've found that I can get a successful boot if I boot into single-user mode, mount / as read/write, and then do ...
1
vote
0answers
40 views

I cant see my bootable 10.9.3 usb drive on mac

I downloaded 10.9.3 dmg file (aprox. 5gb) from torrent site. Than I installed trasmac to my other windows computer and created a bootable usb with it. But when I plug this usb to my mac I could not ...
0
votes
1answer
39 views

Booting an iMac using a Macbook Pro's internal disk

Suppose I have an iMac and a Macbook Pro. My Macbook Pro is my primary workstation, and when I switch to the iMac I would like my environment to be exactly the same in order to facilitate switching ...
1
vote
1answer
323 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 ...
2
votes
3answers
347 views

iMac won't boot off of Mavericks USB when downgrading from Yosemite

I made the biggest mistake of my adult life and installed Yosemite without backing up my HDD. Fortunately, I do have most of my actual files and programs saved to my external HDD, but that leads to ...
2
votes
0answers
254 views

iPad 1 won't boot, flashes apple logo

I have recently acquired a refurbished iPad 1 WiFi + 3G. Straight out of the box it wouldn't boot up at all. No logo, or anything. Upon plugging the device into the AC power charger, the Apple logo ...
0
votes
0answers
60 views

MacBook Pro wont boot: Stuck on Grey Screen

So, I've done all the typical checks, including putting the Macbook in target disk mode and wiping and resinstalling OS via my other computer. I know the drive is functioning - I can boot my desktop ...
1
vote
1answer
73 views

No Partition to install Yosemite to

I wanted to have a clean Yosemite installation. Therefor I deleted the existing partition to make sure a completely clean installation is made. The problem is that I cannot choose the partition to ...
1
vote
1answer
2k 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 ...
0
votes
0answers
26 views

External disk boots installation system, but not installed OS

I have an external NewerTech Voyager Q, connected with Firewire. In it I have my old internal HD. I used to have OS X Snow Leopard on it, so it's correctly formatted and bootable but it would never ...
1
vote
0answers
46 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 ...
2
votes
3answers
25k views

Gray screen after installing Yosemite

Yesterday I updated my 2012 MacBook Air to Yosemite. Everything was good, everything working great, but, at the end of the night, my laptop’s battery was low so I decided to shut it down, instead of ...
1
vote
3answers
9k views

How do I fix my SSD after installing Yosemite and Enabling TRIM? No boot & can't erase

I recently upgraded to Yosemite, enabled FileVault and foolishly enabled TRIM (had no idea it wasn't supported). Upon restart, my machine gets the grey screen with the crossed-out circle of death. ...
0
votes
0answers
49 views

Brand new Macbook Pro no longer working — can't reinstall, can't boot into recovery

Just got a brand new macbook pro w/ retina for my gf about 2 weeks ago. She's been on the laptop about 4-5 times. The last time she tried getting on it, she kept logging in and getting to a screen ...
0
votes
1answer
3k views

Fixing a Windows partition boot using OS X tools

I've got a triple boot system on my Early 2013 Mac Book Pro: OS X, Windows 7 and Ubuntu. I'm using rEFInd as my boot manager. My Windows install boots using legacy BIOS boot, and OS X and Ubuntu boot ...
0
votes
1answer
26 views

Clock problems with dual boot mac system:- 10.6 and 10.8

I have a dual boot mac pro 3,1 : one hard drive with Snow Leopard (10.6.8) and one with Mountain Lion (10.8.?). When I boot up with Mountain Lion it unfailingly resets the clock to about 4 am. This ...
1
vote
1answer
30 views

what does it mean if my macbook loaded in safe mode?

My MacBook just booted in safe mode. Is it possible that somehow I made it to do so, or can it automatically load in case of a malfunctioning? What does it mean if it did so automatically?
0
votes
1answer
127 views

Cannot repair disk0s2 with mavericks utility disk on a SSD

I was trying to repair a corrupted partition (OSX Mavericks) the mac doesn't boot anymore (grey apple logo with infinty spinning gear). I've just tried with safe mode, PRAM restor etc... And the ...
0
votes
0answers
81 views

Can't boot on OS X partition after resizing Windows partition

I initially had three bootable partitions: OS X Recovery for OS X Bootcamp (Windows 8) Now, on Windows, I decided to make my Windows partition smaller, reducing its size using the native Disk ...
1
vote
0answers
24 views

How to use an external disk to boot to Windows?

I want to be able to boot into windows. I only have 256GB on my Mac, and my current windows C: drive has over 112 GB in it used. So I would like to keep the on-board SDD free for OS X. Is it possible ...
0
votes
0answers
73 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. ...
1
vote
0answers
126 views

MacBook Pro does not boot after upgrade problem [closed]

I tried to upgrade my MacBook Pro from Mavericks to Yosemite (Developer Version.) The setup was ok, nothing wrong, but when I tried to install the Preview 8, it stopped responding right in the end of ...
6
votes
4answers
991 views

Is it possible to install an old version of Mac OS on a new Mac?

I know that Apple doesn't want me to run a version of Mac OS older than the one my Mac came with, but is there a way around this? For example: if I buy a new Retina MacBook Pro, is there a way to run ...
0
votes
1answer
52 views

Mouse disconnected after booting

Everytime I boot up my iMac (OS X 10.9.3) it doesn't find my mouse. If I unplug the mouse and reconnect it after around 20 seconds, it works. It's an USB mouse. Every other USB device works fine. I ...
0
votes
2answers
62 views

MacBookPro10,1 had problems booting, now some system images are pink and fuzzy

A friend just recently bought a MacBookPro10,1 (MacBook Pro Retina, 15-inch, Mid 2012) off of craigslist, it all checked out and worked fine until we erased the hard drive and reinstalled Mavericks ...
0
votes
1answer
35 views

Where does the OS X routing table come from?

Trying to find out where the initial routing configuration for OS X is stored (plist, or wherever), and what happens at startup to read that configuration and configure the network interface(s).
0
votes
1answer
20 views

Flashing Folder on Mac Pro 1,1 after trying to Bootcamp

So I bought a Mac 1,1 and it runs great, until I tried to bootcamp it the other day with an old windows HDD i had. I downloaded windows, and tried to bootcamp it and now it will not boot the Mac HDD, ...
2
votes
0answers
263 views

Yosemite Startup Manager After Downgrading to Mavericks

I downgraded from Yosemite Public Beta to Mavericks by: Created bootable Mavericks USB Booted Mac to the Mavericks USB Went into Disk Utility > Selected HD and Erased HD Restored to Mavericks Time ...
1
vote
0answers
82 views

MacBook won't boot from internal SSD

I got a 2011 MacBook Pro and had a Samsung 840 Pro installed running Mountain Lion, then Mavericks for about a year without any problems. Without any apparent reason the MBP just wouldn't boot from ...