A hard drive is a device for permanent or long-term storage in computers.

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USB drive causes “OS X Can't Repair The Disk” error repeatedly

I've got a 2.5" 1 TB external that I've used for a couple years now. Initially it was in an OWC enclosure, and then more recently its in a Sabrent enclosure that I bought off of Amazon to get USB 3.0 ...
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969 views

Recover Deleted Files on Mac OSX [External NTFS]

I have accidentally deleted some files on my Mac OS X Mavericks. Actually, I was trying to burn an .img file to my flash drive which was located at /dev/disk1 (at the same time I had connected a NTFS ...
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16 views

Can't erase unmountable external HD

My external HD isn't mounted and can't be repaired by Disk Utility. However, I'm also unable erase the disk: $ diskutil list disk2 /dev/disk2 #: TYPE NAME ...
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1answer
29 views

Is there a Byte-By-Byte Duplicate File Removal app for Mac? (not SHA-1 or MD5 hash!)

I recently switched to Mac and spent way too many hours on PC trying every duplicate removal app, eventually discovering that byte-by-byte checking was necessary to get accurate (safe) results, and ...
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1answer
24 views

My MacBook Pro, gets stuck at boot screen and the graphics look weird

I have a 2011 MacBook Pro i7 and I have upgraded the memory to 8 GB and the HD to an SSD 500GB. The other day I had it running for 3 days non-stop and when I tried to use it it was frozen. I reset it ...
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1answer
8 views

Late 2011 MacBook Pro Cannot format HDD

I have a Late 2011 MacBook Pro with 750GB HDD. I was running Yosemite 10.10.2. I had about 250GB of partitioned HDD that i wanted to add to my main partition 'Macintosh HD'. It let me remove the ...
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1answer
39 views

Problems with target disk mode, HD does not show in Finder/Desktop (only in Disk Utility)

I have a MacBook Pro which goes straight to Disk Utility when I try to start it (it totally froze and I forced it off and on). And no luck in repairing the hard disk (Disk Utility can't repair…) I am ...
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10 views

New drive won't boot internally

So I purchased a new 2TB drive (Samsung model #ST2000LM003) for my 13" MacBook Pro. No issues with the old one, just getting close to capacity. I connected it with a SATA/USB adapter, formatted it, ...
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5answers
8k views

How to set VirtualBox in order to access external hard drives in guest Win7?

I have installed VirtualBox in order to use Windows 7 as guest on a Macbook Air running Mavericks (mainly to be able to use a printer that has no drivers for Mac). Also, I have installed the ...
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1answer
27 views

Force stuborn drive to unmount

I have a single partition disk whose filesystem will not mount properly. I don't care about the data and I would like to try reformatting the disk but I keep getting errors related to a failure ...
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2answers
36k views

Disk Utility won't Unmount HD for formatting

I have two internal drives in my 27" iMac (10.8.5). An SSD system disk and a 1TB SATA drive. The HDD has been acting up recently, very slow performance, bad behavior etc. Tech Tool Pro and Disk ...
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2k views

Airport Extreme 802.11ac Can't See USB HDD

Hardware: Airport Extreme 802.11ac Transcend StoreJet 250GB HDD Belkin 4-port, powered USB hub Configuration: HDD formatted as MS-DOS (FAT32) via Disk Utility HDD connected to USB hub Airport ...
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1answer
23 views

External Drive showing only in system profiler

I have had a 1TB Western Digital Ultra external hard drive for nearly year. Out of nowhere it will not show in disk utility but it does show in system profiler. I have a Macbook pro mid 2012 running ...
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1answer
20 views

Can I use a large external hard drive both as installation media and backup drive?

I am planning to upgrade my Mid 2010 13" Macbook Pro to Yosemite from Snow Leopard, on a new SSD hard drive. Being more experienced now with UNIX/Mac, I want to have a clean install to get rid of the ...
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2answers
380 views

How to access the full capacity of hard drives larger than 2TB with OS X Yosemite?

Last week, I bought a 4TB hard drive to connect to my MacBook Pro. My quest to have access to all the 4TB on my Mac was more difficult than expected. After a lot of experimenting, I managed to create ...
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1answer
1k views

External drives won't mount on restart

One of my staff just got a new Mac mini with the USB 3 ports and Mavericks. It has 2 Seagate GoFlex 3TB hard drives connected: 1 for Time Machine, the other for Dropbox files. When the computer is ...
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50 views

Time Machine backup external disk not mounting anymore

I just installed Security Update 2015-002 (Version 1.0) on my MacBook. The latter has a 1.0TB internal hard drive, backed up onto a 2.0TB external USB2.0 3.5 inches hard drive. However, after ...
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5answers
3k views

Western Digital external hard drive is constantly ejected

I have a 1TB Western Digital external hard drive that I use for Time Machine backups, and recently my iMac has started to randomly eject the hard drive, preventing backups. It tends to happen while ...
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2answers
1k views

Encrypted external drive usually prompts for password, despite being in keychain

I have an external encrypted drive, and almost every time I plug it in, it'll ask me for the password, even though it's already in my keychain. If I type the password in, it'll mount as expected. ...
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1answer
66 views

Hard drive no longer accessible

This is a 4 TB hard drive formatted in Mac's Disk Utility as a single non bootable Exfat partition with the drive letter G. It worked fine before I decided to make a clone drive of my C bootable ...
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2answers
42 views

MacBook Pro 2010 all of a sudden slow

So literally out of the blue, my MB Pro is giving me the rainbow for minutes at time for 99% of the things I try to do. I maxed out the memory to 8GB last year, and that made a huge improvement, but ...
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2k views

How can I browse the hard disk attached to my Airport Extreme from my iPhone?

I have a gen 5 AEBS which has a total of 3 HFS+ partitions across 2 USB hard drives (USB hub in the middle). On my Macbook Pro Retina, I can see all 3 HFS+ partition in the Finder. Finder shows the ...
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1answer
9k views

macbook doesn't recognize internal HDD, only when connected via USB

yesterday something weird happened. After my 13' macbook pro ( early 2011 ) was running all night while playing music, in the morning I just closed it and went home from my friends house. When I got ...
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1answer
5k views

Mid-2012 MacBook Pro hard drive failure (maybe? not really.)

Mid 2012 MBP with OEM hard drive. I booted it this morning to a flashing question mark folder. I happened to have an external drive with OSX on it, booted to that external drive just fine. I opened ...
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1answer
460 views

Synchronise/Merge MP3 collections without duplication or huge copies

I have one drive containing about 90GB of MP3s which is used at home, it serves three Squeezebox players though the Slimserver software running on one of the desktop Macs. I have a separate firewire ...
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2k views

How do I keep the Recovery HD and EFI partitions from automatically mounting on my MacBook Air?

I've set Finder preferences on my MacBook Air running OS X 10.9.1 to show everything on my desktop: I've noticed that storage partitions called Recovery HD and EFI appear there: What are they? ...
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14 views

Time machine backups

I recently tried to use the time machine backup but in the middle, it had about 15 minutes left...I shut my laptop (on accident). I got freaked out so I unplugged the external hard drive I was using. ...
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3answers
38 views

MacBook Late 2008 SSD Upgrade

I have the late 2008 edition of the unibody MacBook. It has a built-in HDD which became unbelievably slow. The other tech-specs are: Now, since its not too bad regarding the processor and the ...
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1answer
25 views

Target disk Macbook Pro HD not showing on Host Macbook Pro

I'm trying to recover some data such as movies, pictures, etc from my brother's macbook pro before he takes it in for a depot repair. Anyway, like i've been told, I boot his macbook into target disk ...
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2answers
44 views

Is there a limit on how much hard drive space a computer can handle?

I'm thinking of getting a new SSHD for my early 2011 13" MBP, and if I do, I had the idea to give my 500GB HDD to my friend who has a 2007 MacBook (white polycarbonate). He seems to think that his ...
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28 views

iPod classic hard drive upgrade

I was reading online that you can replace an iPod classic hard drive, my question is how do you manage to duplicate the iPod OS onto the new hard drive? How do you mount the iPod classic hard drive ...
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1answer
25 views

Does a bootable OS X drive need more free space than the installer?

I made an 8GB partition on my HD to serve as a bootable OS X Yosemite drive, but it seems to still have 2.63GB free after the bootable drive-making procedure. Does the bootable drive need that space ...
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1answer
39 views

Partition on External Hard Drive not showing in Finder

My external hard drive is partitioned into three parts - but somehow I made one of the parts go away/stop showing up in the Finder. I ran a set of recommended commands in terminal, and this is what I ...
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1answer
56 views

HFS+ invalid number of allocation blocks

Okay so a few days ago I wanted to install Ubuntu GNOME over regular Ubuntu and it gave me the option to automatically overwrite my Ubuntu installation (that I had on a separate partition from my OS X ...
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2answers
4k views

Restore Recovery HD partition from Yosemite downgrade

I recently got back to Mavericks from Yosemite, everything went fine. As I normally do, I checked my HDD with the Disk Utility and found some trouble, then I boot on recovery mode to fix my HDD. I ...
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2answers
509 views

Mid 2009 MacBook won't recognize [any] hard drive

My MacBook had been acting fine. I applied the latest update to Mountain Lion and closed the lid. When I opened the lid, it wouldn't wake from sleep (dark screen with whirring fan for ~5mins). I held ...
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1answer
34 views

MBP with Serial ATA hard drive vs PCIe-based flash storage

I am not sure how much logical my question is but I am planing to purchase MBP for the first time and looking at the options I have in place, I am all confused. I am looking at these 2 options ...
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1answer
21 views

2nd SSD as main boot disk, what do I do with old filesystem?

Hello StackExchange! After a couple years of using my macbook pro, performance has deteriorated with each update to OSX. I've tried a few things to improve it, and with no results, I decided to get a ...
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Brand new 15in retina

I bought the mac then hooked up Time Machine and started restore to Mac HD. All was fine until the end when the backup from on 6 minutes to go for a couple of hours. No progress at all. So after ...
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jet-drive expansion card full with duplicate files like startup disks, how to prevent?

MBP retina 2014 Mid yr 13" w/ Yosemite , Start up disks were saying they were full within one week so I bought jet-drive expansion card and it keeps filling up with duplicate files just like Mac does, ...
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65 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 ...
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1answer
1k 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, ...
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2answers
138 views

Third party SSD optimization Yosemite

Unaware of the current issues with Third-Party SSD support on Yosemite I went ahead and bought a 128 GB Crucial MX100 SSD. I hear a lot of problems about enabling Trim on Yosemite etc. I recently ...
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5answers
35k views

How to restore Mac OS X on a new hard-drive?

I am going to upgrade my MacBook Pro hard-drive, but before doing so I'm trying to figure out how to restore OS X on it. My DVD drive doesn't work so I cannot re-install from the DVD. I have a recent ...
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3answers
7k views

A flashing folder with question mark

I have a rather strange problem with my MacBook Pro (13-inch, Late 2011). Whenever I start my computer I see a flashing folder with a question mark. I know this is supposed to be a common problem ...
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4answers
244 views

How do I temporarily relocate my Time Machine backup files

I have a 1TB WD My Passport external hard drive that I've been using for Time Machine backups. I recently had an issue with it where I can't save to it anymore because it was corrupted. The way to fix ...
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1answer
32 views

My internal “Machintosh HD” is not detected by my MacBook Air

I was trying to clean install OS X (from http://www.ibtimes.co.uk/how-clean-install-os-x-yosemite-via-bootable-usb-flash-drive-1470625). I made the bootable disk, booted from it, and tried ...
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4answers
568 views

How can I automatically have my Trash emptied when disk space gets below a certain point?

Sometimes my hard drive gets low on space, and various things don't work properly until I empty the Trash and free up some space. I know there are applications that empty the Trash after a set ...
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6answers
58 views

Upgrade RAM or switch to SSD? [closed]

I have a 2010 MacBook Pro (2.4Ghz) with 4GB of RAM (2x2) and a 250GB hard drive that's about 85% full. It's been running pretty sluggishly lately even for basic tasks. It is 5 years old, but a new ...
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1answer
592 views

Error / Hang Installing Yosemite and Mavericks on Mac Pro SSD

Having had a hard drive failure, I'm attempting a clean install of Yosemite on a 2010 Mac Pro, with a brand new 120GB OWC SSD. I've tried using a Yosemite boot disk, using both an external hard drive ...