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

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External disks are recognized as internal ones by my iMac

When I connect portable USB disks to my iMac via a USB hub, my iMac always recognize them as internal disks. Like this, However when they're connected directly to the USB ports on the back of my ...
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2answers
120 views

What filesystem should I use to share across Mac (Yosemite) and Linux?

I need to move large files (5-5Gb) from a Mac to a Linux machine. Network transfers are too slow, so I wanted to use USB drives. However filesystems seem to be a bit of a nightmare: HFS+ is hard to ...
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46 views

Cannot create a dmg file and save it onto a usb flash drive. Error: Unable to create “ ”. (Operation not Permitted)

I currently am trying to create dmg files from folders inside my 128 GB flash drive. I recently re-formatted it into the exFAT format. The folders I am trying to convert into a dmg file are around 15 ...
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0answers
102 views

Hidden files taking up hard disc space?

I’ve used DaisyDisk to analyse my file usage on my MacBook Pro (mid–2012), but the numbers aren’t adding up. Of 500GB, it shows ~425GB used, but the breakdown only adds up to 280GB. The diagram itself ...
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1answer
71 views

Disk utility will not allow me to resize a partition on an unencrypted external hard drive

I want to back up a copy of Windows onto a new partition of external hard drive currently formatted in exFAT. I don't know how to use Windows, so I want to use my Mac (mid-2009 MacBook Pro, running ...
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1answer
24 views

Migrate 1 TB of iMovie '11 to iMovie 10.x if migration requires twice the disk space?

I have about 1 TB of movies in iMovie '11 (version 9.x) format, and I need to migrate this library to iMovie 10.x now. This process is described here: https://support.apple.com/kb/HT202853 However, ...
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1answer
88 views

Lost hard drive space to Boot Camp

Boot Camp caused ~200 GB of my 750 GB HD to disappear and I cannot re(un)-partition it through Disk Utility and when I try to reformat the storage through the terminal using: diskutil cs resizeVolume ...
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1answer
836 views

VirtualBox VERR_NOT_SUPPORTED opening Windows 10 partition/vmdk

I'm trying to virtualize my physical Boot Camp partition, so I can do small Windows tasks from Mac without restarting. I followed mostly this tutorial but also read others. But now when I try to ...
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3answers
532 views

Can there be two separate Time Machine Backups on the same external drive?

I'm interested in buying an external hard drive. I'd like to know whether if it's possible (and simple if so) to have two separate Time Machine Backups from two different MacBooks at the same time?
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1answer
42 views

Hard disk default icons

This is just a curiosity: what's the reason I ended up having two different icons for two external hard drives? In my case in the Finder I have: The information panels for these two are: On ...
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1answer
116 views

Can I enable FileVault and then partition my hard drive later?

I just bought a 2014 MacBook Pro with a 512GB SSD. I updated to El Capitan today and when it booted up for the first time, it asked me if I wanted to enable FileVault. I chose not to because I wasn't ...
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2answers
156 views

Fusion drive is not working although the system can find the SSD

I own an iMac late 2013 with a fusion drive. Recently I installed Windows 8.1 using Bootcamp on a separate partition on my disk. After a few days, the booting process of OS X started failing and I had ...
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1answer
62 views

How do I create a browsable index of my External Hard Disks?

I have 7-8 External Hard Disk Drives. I would like to be able to know the content of each of the drives (files and folders) without having to connect them to my system (cumbersome). Is there and ...
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1answer
55 views

I've tried to export from Photos to hard drive but it says my Mac Hard Drive is in “read” only mode How change so I can export?

Took me forever how to finally figure out how to export photos/videos from the new Photos app to an external hard drive - which I must do to free up space as I have over 100 gig of footage I've shot ...
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1answer
181 views

Problem with 3 TB Fusion Drive, it can't be deleted, formatted or partitioned

I want to clarify that I already followed the instruction with I think I messed up the Fusion Drive on my 1TB iMac (with BootCamp) but I think I have mayor problems. I followed the instructions to '...
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2answers
471 views

How do I backup and external hard drive (iPhoto Library) to another external hard drive?

My iPhoto Library is on an external hard drive. I want to copy it to another hard drive as a back up. It looks like Time Machine only backups the internal hard drive and selected externals. I don't ...
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1answer
36 views

Macbook Air hard drive - nearly full warning [duplicate]

I went to upload some photos and videos onto my macbook air and was told there was not enough free space, so removed some things onto an external hard drive and emptied my trash. I now have over 30 gb ...
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1answer
95 views

MacBook Pro suddenly started to freeze with any action (using SSD)

I'm having a trouble with my MacBook Pro (Mid 2012). I have upgraded it (5 months ago) to use a Kingston SSD instead of a SATA, and everything was perfect. Very fast and smooth...until yesterday. I ...
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69 views

Cannot change startup disk - Yosemite

I've got a clean install of Yosemite on a brand new hard drive. All good, up and running (got to boot to it manually). As the title says, I can't get the system to boot from this hard drive. Error ...
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0answers
33 views

How to be sure that I installed the fusion drive properly?

Hello guys I would like to know how to be sure that I properly installed the fusion drive because last night I bought an iMac but I had to reinstall el capitan for reasons but since I'm a newbie I don'...
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17 views

Can a backup HD be erased despite it NOT being able to be “unmounted”

An external portable HD simply stopped working [no longer recognised by my Mac] so I took it back for warranty replacement. He couldn't read or "unmount" it either [whatever that means] so I just said ...
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2answers
109 views

Not able to restore my 3TB fusion drive late 2013 iMac

Last weekend my iMac started to act in a very strange way. While I was working, my Mac was very slow and the mouse and keyboard didn't respond very well. So I decided to reboot because having two ...
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1answer
109 views

How can I encrypt a disk where diskutil cs convert reports “a problem”, leaves disk unreadable?

I'm trying to encrypt my Time Machine backup volume, but diskutil refuses, and leaves the disk unreadable (but repairable using Linux). How can I proceed? It's a Western Digital Elements 107C 3TB ...
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24 views

How can I fix my external HDD?

So, my mac suddenly restarted because of an error. I was downloading some files in my external HDD when it happened. When my macbook started up, I could not open my external HDD, I tried to repair it, ...
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1answer
80 views

Move hard drive from macbook pro to macbook air

I have a Macbook Pro with a 250 GB SSD hard drive (Macbook retina Mid 2012 i7) and a Macbook air with 120 GB SSD hard drive (Mid 2012 Intel Core i5). I would like to move the swap the hard drives if ...
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2answers
363 views

Disk utility detecting error in single user mode, but not when disk utility is opened via recovery mode

I verified the integrity of my Macintosh HD (MacBook Pro 13" 2012, OS X Yosemite) with Disk Utility when I was logged in as a user and it reported this problem: Invalid volume free block count ...
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1answer
78 views

Windows using Bootcamp won't read any USB memory sticks

I just installed Windows 10 on my MacBook (Early 2015, OSX El Capitan 10.11.2), and after everything set up I tried to plug in my External Hard Drive. I made sure this HD would and does work in ...
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33 views

Rsync for backups

I have gotten into the habit of using rsync to do my own backups of an encrypted volume containing my personal info onto an external hard drive. I did not use Time Machine, because I do not own the ...
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1answer
37 views

Don't want my hard drive to die again!

A couple of months ago, my Mac Book Pro wouldn't start up - it would make it halfway through and then power down. I took it to the repair store, and they said the hard drive was broken, and they ...
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1answer
267 views

Time Capsule backup consistently fails

I am running El Capitan (10.11.3 beta) on a 2011 27" iMac. Recently, my Time Machine backups (I have a Time Capsule connected to the computer directly by USB) started to fail. First, I got a message ...
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129 views

How to recover corrupted HFS+ partition in external HD?

I've got a 1 TB SeaGate FreeAgent Drive with following partitions: 700 GB ExFAT (labelled as FREEAGENT1) 300 GB HFS+ (labelled as FREEAGENT2) While moving data from 1 to 2, it got accidentally ...
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1answer
251 views

How to force a readonly volume to remount as read-write?

I have an external Firewire volume with some filesystem problems. One problem is that Disk Warrior can't fix these errors because there is not enough space left on this volume (in fact, it is ...
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270 views

How to mount a disk that was not ejected properly?

I am using OSX El Capitan 10.11.2 I have an external Western Digital of 1TB When I ejected I did not do with the properly way and now I am not able to mount I can see the disk here But when I ...
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262 views

External Hard drive are always readonly, even HFS+ and FAT32 format

I am running in to a peculiar problem. I have 3 external hard drives and few weeks back, I may have ejected one of them ungracefully. Ever since, they all are getting connected in read only mode. I ...
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1k views

How can I upgrade MacBook Pro disk space?

I have a fairly new MBP with 256 GB of SSD as disk space. I am running out of disk space now. Most of it is being used by Pictures and Music and I have done all the cleaning I could. What's the best ...
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1answer
46 views

Seagate External HD (GoFlex) Crashes Macs

Situation: My most important external Hard drive is crashing my computers. It had my time machine backups and random files stored. I've tried it on my iMac and Macbook Pro. It may be worth noting I ...
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93 views

M.2 SSD Adapter for Mac Pro Tower

I'm in the process of buying an used 2012 mac pro. Now, I noticed that on ebay, many of them are offered with M.2 (Pci-e) SSDs, which indicates they have been equipped with a M.2-to-PCIexpress4x ...
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187 views

NTFS Disk “failed to mount”

I have an iMac running El Capitan, and an external disk formatted NTFS that will not mount on the mac. It will mount perfectly in Windows and Ubuntu. I'm not trying to write to it, right now I just ...
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1answer
24 views

Where is my .bashrc file in a dd image?

I created an "emergency" image of my entire HD using the procedure explained in Recover a dead hard drive using dd. I spent a lot of time fine tuning my .bashrc and .profile files, but I cannot find ...
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1answer
116 views

Exchange Time Capsule hard drive with PS4 Hard Drive

is it from the data and values possible, to exchange the PS4 and Time Capsule's Hard Drive? So built in the PS4 the Time Capsule hard drive and in the Time Capsule the PS4 Hard Drive. Could anyone say ...
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64 views

How to open a NTFS disk image file in OS X

I have a failing external HDD that I cloned to a working external HDD by making a disk image of it. Unfortunately, that cloned disk image file (and the original HDD) are of NTFS format. (I ignorantly ...
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1answer
823 views

Can't see FAT32 and NTFS external partitions on OS X El Capitan when SIP is enabled

I've installed Homebrew, FUSE for OS X and NTFS-3G. It helped to see external partitions (FAT32 and NTFS) when SIP is disabled (OS X El Capitan). But when SIP is enabled, I can't see NTFS and FAT32 ...
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1answer
771 views

BootCamp can't partition

I had a problem with my Macbook that couldn't read the internal SSD and boot OS X, but I solve it: MacBook does not mount, does not boot, does not read drive . I used resizeStack method to get the ...
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2answers
2k views

EFI system partition repair

I'm having a problem with the internal SSD on one of my Macs running 10.10. It was working fine when I was browsing the web one day and then suddenly froze with the spinning beachball; I couldn't ...
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1answer
90 views

What is it that prevents using a 3rd party SSD in a 2015 rMBP?

I bought an Early 2015 MacBook Pro Retina model with the 128GB SSD and have been wondering what to do if I need more disk space.. then I found out that it's currently not quite possible to just stick ...
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1answer
182 views

Decrypt an external hardrive FileVault

Recently, I had an accident with my Macbook Pro. I dropped water on it and the motherboard is now dead, which means my Macbook Pro is also dead. Hopefully, the hard drive isn't damaged. When I plugged ...
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2answers
361 views

I think I messed up the Fusion Drive on my 2TB iMac

I want to ask you how can I get back together my Fusion Drive (merge HDD and SSD together). I was installing Windows 10 and during installation it crashed and I was not able to boot in Windows neither ...
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1answer
144 views

How to mount a DMG image created with dd?

I created an "emergency" image of my dying HD using the procedure explained in Recover a dead hard drive using dd. Now when I try to mount the dmg file I get the message: "The following disk image ...
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1answer
512 views

How do I fix a corrupted USB drive on OS X?

I accidentally bumped the drive while repartitioning it and it unmounted. After that when I tried to repartition with Disk Utility I got Partition Failed with the error: Could not open device Now I ...
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1answer
197 views

How do I ignore ownership on an external hard drive without using Get Info?

I have been trying to set my external hard drive to ignore ownership in permissions, but I can't seem to do it. I am trying to enable the ignore ownership option because I am trying to run Xcode from ...