Questions tagged [external-disk]

A storage device attached to a computer, but not enclosed within the computer's casing

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Change default action for copying files to external hard disk

The default behaviour on Mac OS when you move files from your machine to an external device is to copy these files. How can I modify this behavior so it moves the files, rather then making copies?
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How to install Ubuntu on original APFS Mac SSD?

I have a 2015 MacBook Pro 12,1 and I replaced the original 128GB SSD with an OWC Aura X2 1TB SSD. I was able to put the original 128GB SSD in an enclosure that they provide. I would like to use this ...
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Partition Map Check failed because no slices were found - External Drive

I have a WD My Passport external drive which is giving me the runaround. Yesterday I unplugged it from a Windows PC I was using without 'safely removing' because there was no icon in the system tray ...
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Connection protocols to enable external drives to connect to late 2015 27-inch iMac

I need to connect two 4TB or, better, 5TB external drives to the free Thunderbolt 2 port on my late 2015 27-inch iMac, hopefully daisy-chaining these new external drives together so I can use just the ...
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Unable to import notebook from my desktop “MAC”

I recently switched from a Windows PC to a MacBook Pro at my job. It's been extremely difficult to try and get my notebooks imported to onenote on my new mac. For someone reason, I don't see any ...
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Behavior of macOS After Toggling Secure Boot on T2 Chip: Does It Remember the ECID?

I am reading up on the T2 chip as I look at plans to avoid multiple machines by consolidating various OS requirements onto a single computer. It sounds like I can use Full Security for Secure Boot in ...
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How to fix “Operation not supported” on mac os

I am trying to install the Flutter onto my computer onto an external drive I have followed the instructions on their website to try and install it. https://flutter.dev/docs/get-started/install/macos. ...
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Relocating /Users folder in MacOS 10.15 (Catalina)?

In the past when we wanted to offload the /Users folder from the internal disk we simply created a symbolic link for /Users that pointed to /Volumes/External_Drive_Name/Users. The Mac in question is a ...
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1answer
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macOS Catalina renamed external volume name

I have an external APFS RAID 1 array made of three USB hard drives connected to my Mac Mini. Before I installed Catalina (10.15) on my Mac Mini, this array was called "Primary" and was mounted as /...
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1answer
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Can I use multiple partition external HDD connected to Apple Airport Extreme for Backups from both Mac and Windows PC

I have a 6TB external drive partitioned into two equal partitions. One is NTFS and the other is compatible with Time Machine backups. The drive is then connected to the Airport Extreme via USB. The ...
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Home directory on external drive…Catalina requires the external drive to be bootable

After a long discussion with Apple Support and being transferred to a senior support engineer, I was told that if my home directory was on an external drive that it now needed to have an OS on it and ...
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[Catalina]: GetMasterBlock: Error 1 opening /dev/rdisk2s2 during read-write mount

After upgrading to mac os catalina, I am unable to mount my external SSD drive in r/w mode. The external SSD drive is my time machine backup drive. $ sudo mount -v -u -w /dev/disk2s2 /Volumes/...
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Is there a way to create APFS snapshots on external drives?

There are many guides explaining how to create and manage snapshots on APFS via tmutil, but all of these seem to only work within the framework of Time Machine local snapshots. Is there any way to ...
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Can't add shared drive as Time Machine drive

Solved by this. Can't post as answer due to low reputation on this network site. on the server (in my case the iMac) in the settings --> sharing tab, disable file sharing (no need to reboot or ...
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How do I run Boot Camp Assistant on a partition on an external drive?

I've partitioned my external HD and I want to install Windows 10 on it using Boot Camp Assistant. When I open Boot Camp Assistant, it shows my whole Hard Drive, not my partition. I've got the Windows ...
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1answer
244 views

Can't unmount external disk used with Music app due to AMPLibraryAgent process

I use an external storage disk for my Music library in macOS 10.15 Catalina, because the required file size is several times my internal SSD. After upgrading to Catalina, now when I connect the drive ...
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1answer
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Uninitialized HDD after GPT to MBR conversation, 3 HFS+ Volumes and 1 ExFAT

2 TB External Hard Drive. Error during converting from GPT to MBR and now Disk can't be mounted. 'The disk you inserted was not readable by this computer' appears when HDD is plugging in. Files ...
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Connect Mac CD drive to another Mac

Question: Can I take apart a CD drive from an old MacBook Pro and connect it to a newer MacBook Pro that does not have a CD drive? Background: The old MacBook Pro is broken, but the CD drive still ...
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Output of diskutil info: dlopen(…): code signature in (…) not valid for use in process

When I run diskutil info on an external drive, the output contains errors that make me wonder if I need to be concerned about the security, or at least the stability of my computer: 2019-10-03 11:03:...
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1answer
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External USB-C SSD not recognized on MacBook Pro

I am using a MacBook Pro Retina 15-inch (Mid, 2015) running macOS Catalina 10.15 Beta (19A558d). I want to use an external USB-C SSD drive (512GB) to use Windows To Go and store other files. Since my ...
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Unable to Erase External Hard Drive - Unable to lookup the APFS Container Reference

I have an external hard drive that I put a linux operating ISO on, but now I am trying to erase the external back into ExFat format to store files on it. When I go into DiskUtil, and try to erase it, ...
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1answer
25 views

Does skipping “device enrollment” make files inaccesible to supervisor?

Basically, I have a MacBook pro issued from work, I want to play some games so I have installed macOS X on external drive and boot from it. Now I get "device enrollment" notification every few hours ...
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How do I get rid of a re-appearing B&W hard drive icon on my macOS desktop?

I have an iMac running OS X Yosemite 10.10.5 and an external hard drive with 3 partitions. The external HD was unplugged and left unplugged. Since then, it appears on my desktop at every startup, ...
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how to transfer files from mac desktop to an external harddrive

I have files on the mac desktop that I want to transfer to a brand new external harddrive. I do not understand why it is not a straight forward matter. I am trying to drag the files I want to transfer ...
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110 views

How to completely stop “Disk Not Ejected Properly” message?

I use my MBP to charge my iPod and regularly unplug it without ejecting first - perhaps my laptop is asleep or I changed nothing... How can I stop this message? I'm aware of the reason for the ...
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External Hard Drive on Mac Won't Mount

I can't mount an external hard drive. I have tried booting into Safe-Mode, mounting via Disk Utility and running First Aid, which won't proceed due to the following error: diskutil eject disk1 ...
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Time Machine can't back up to an attached external USB drive

Mac "A" (iMac, macOS 10.14) has an attached USB hard disk "EXT" (3TB, GUID, macOS Extended, Journaled). Mac "A" can use Time Machine successfully to back up to external drives shared from other ...
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Not Admin | Firmware password error | Recovery Mode wont boot

This probably sounds pretty sketchy, so I’ll preface my question with a brief run down of how I got here... Pretty sure I was hacked... It’s a mid-2012 running High Sierra on a SSD harrdrive. ...
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Samsung X5 external SSD not recgonized

I'm having trouble getting macOS Mojave to recognize a Samsung X5 external SSD. When I plug the drive in, it lights up, but the OS doesn't seem to see it. I've plugged the drive into a Windows PC ...
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Unable to open Seagate HDD in MacBook Air running on macOS Mojave 10.14 (Using Paragon NTFS for Mac)

Please advise on how to open the HDD again. This previously worked fine and also HDD works on Windows 10. I am using Paragon NTFS for Mac to read the HDD.
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External hard drive not mounting

I have an external hard disk drive that's a few years old and lately it's been causing some issues. It started by unexpectedly unmounting, and a few days later it wouldn't mount at all. If I open Disk ...
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Certain files greyed out in external HDD

My question is the same as this one from 5 years ago. I have an NTFS external hard drive and certain files on it are greyed out and can't be opened until I run certain commands on the command line. ...
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Time Machine: Backups.backupdb uses way too much space when copied to another volume

I'm in the process of copying my TM backups to another volume. I followed these instructions: formatted the new volume, set the permissions, disabled automatic TM backup and dragged Backups.backupdb ...
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1answer
321 views

How to restore external hard drive from Time Machine backup the right way?

My Time Machine backup (6 TB USB-HDD) contains the data from my Mac's internal hard drive (2 TB) and from an external hard drive (USB 4 TB, Mac OS Extended, FileVault Encrypted) that I always keep ...
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3answers
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Why does Apple not recommend storing your iMovie library on an external drive?

I want to try keeping my iMovie library on an external drive because I use both my Imac (at home) and my MBP (when traveling) to edit my videos. Ideally, I would like to use a SD card so that it ...
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Why is my iMac able to write to an NTFS external drive but not my MacBook Pro

My iMac (standalone desktop running Mojave) which is formatted as APFS is able to read and write to my Seagate external drive (which is formatted as NTFS). Yet my MacBook Pro (which was formatted as ...
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How do you disable fsck_exfat from automatically running when you plug in an external drive? [duplicate]

If you plug in an external exfat hard drive that the system considers "dirty" for whatever reason, it will not mount it until fsck_exfat is finished repairing it... which never ever ends so it ...
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2answers
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How do I download all iCloud Drive files to external hard drive?

Using Google Chrome, I am trying to download or copy + paste all of my files to an external hard drive so I can delete them afterwards and downgrade my iCloud drive subscription to something cheaper. ...
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Is there a way to go back to a previous state of an APFS Partition on an external drive?

My question sums it up. I would like to go back in time on a partition on an external drive which is formatted on APFS. Decrypting a VirtualBox image, VBox crashed (as it does all the time in Mojave) ...
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2answers
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Why can't I copy a drive in full to another drive?

I am trying to copy one drive to another (both external) - from a 1TB to an empty 4TB drive. I reformatted the 4TB drive, and here is its information: $ sudo newfs_exfat -N /dev/disk3 Reformatting ...
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OWC Envoy Pro Enclosure [with OEM SSD] MacOS Upgrade Problem

I have an Envoy Pro Enclosure (OWCMAU3ENPCIECS / OWCMAU3ENPRPCIU) [w/ OEM SSD - 512GB Mid-2015 Macbook Pro Retina SSD] that I use as a bootable external MacOS installation and it works fine. I have ...
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Mojave install failure “OSIInstallElement failed, Failure Reason: PKInstallErrorDomain:112”

I'm trying to install Mojave on a brand new 2TB Western Digital external hard drive. I've formatted the drive as APFS. The installer gets partway through, and then fails with macOS could not be ...
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2answers
239 views

External disk is hijacked by fsck when plugged in to Macbook

External disk (2 TB Seagate) is captured by fsck when plugged into a USB 3.0 port on my Macbook Pro (macOS Mojave 10.14.5). This has been discussed by @ArielAllon, and indeed, when I kill the fsck ...
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1answer
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Nano Memory card does not show up in Finder nor Disk Utility

I have a Nano Memory card working fine. I know it's fine because it contains a bootable ubuntu OS that is being used in a Raspberry Pi. When I plug it to my Macbook Pro (Mojave 10.14.5) it does not ...
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1answer
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Why does unplugging a drive lead to data loss when moving files?

I did a cut and paste (Comd+C then Comd+Opt+V) on my Mac 10.14’s Finder to move some .mov files from my internal SSD to my WD My Passport External Harddrive. Alas, after a while, I move my Macbook ...
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Unable to mount my WD Easy Store 4TB [duplicate]

I am unable to mount my WD Easy Store 4TB on my Mac. I am using macOS Mojave - 10.14.5. I tried several commands using terminal to unmount, but all in vain. It shows ejected but still shows in ...
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Data loss due to lost connection when transferring to External HDD - are they on the HDD actually?

I did a cut and paste (Comd+C then Comd+Opt+V) on my Mac 10.14’s Finder to move some .mov files from my internal SSD to my WD My Passport External Harddrive (connected by USB 3.0 with a USB-C to USB ...
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143 views

Sharing and Permissions - always shows “Fetching” instead of the user name

I am a basic Mac user, so please bear with me. I have a WD MyCloud EX2 to store large files and videos - over 10000 files, so searching is critical for me. The WD NAS, the iMac are connected via ...
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Why is my external hard-drive is not appearing (most of the time)

I recently bought an external hard-drive, Western Digital 4GB, and I have a MacBook-pro 2015 (15inch). When I received the hard-drive, it worked like a dream, I just re-formatted it to apple's file ...
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Daisy chaining two external HDD

I have two Glyph 1TB external HDDs connected to my Oct 2015 iMac, 27” 5K display, Fusion HDD, OS 10.14.5 1 has a single partition and is devoted to TM backups The other has two partitions: one ...