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FloridaTouch3G
User level: Level 1 (12 points)

LaCie portable drive not appearing on iMac after iOS update

the icon for my LaCie portable drive, for my iMac has disappeared since ios update Golden Gate 27.2.1 on nov 8, 2026. Can anyone help. I can't find my portable Lacie in my settings either. thanks

Posted on Nov 9, 2026 3:45 PM

1 reply

Owl-53
User level: Level 10 (123,805 points)

Nov 10, 2026 1:48 AM in response to FloridaTouch3G

Sorry to hear your LaCie portable drive has disappeared after the November 8 macOS update.


1. Check the physical connection


  • Disconnect the LaCie drive and reconnect it.
  • Try a different USB port on your iMac.
  • If possible, try another compatible cable.
  • Avoid using a USB hub initially.
  • Check whether the drive's indicator light is on and whether you can hear or feel it running.


2. Check Finder settings


The drive may simply have disappeared from your desktop display.


  • Open Finder.
  • Select Finder > Settings > General.
  • Make sure External disks is checked under "Show these items on the desktop."
  • Next, select the Sidebar tab and check External disks under Locations.


3. Check Disk Utility


This is the most important step.


  • Open Applications > Utilities > Disk Utility.
  • Select View > Show All Devices.
  • Look for your LaCie drive in the left-hand sidebar.


If it appears greyed out, select its volume and click Mount.


Important: Do not click Erase, Initialize, or Format. These actions could destroy your existing files.


4. Restart your iMac


  • Disconnect the LaCie drive.
  • Restart your iMac.
  • Once macOS has fully loaded, reconnect the drive
  • Check Finder and Disk Utility again.


5. Check System Information


If the drive does not appear in Disk Utility:


  • Hold down the Option key and click the Apple menu.
  • Select System Information.
  • Choose USB in the left-hand panel.
  • See whether the LaCie drive is listed.


6. Check for compatibility or software issues


Since this started immediately after your recent macOS update, there may be a compatibility or mounting issue.


Check LaCie's support website for any relevant firmware or software updates for your particular drive model.


Avoid installing anything unless it is specifically compatible with your model and macOS version.


A few questions that will help narrow down the problem:


  1. Does the LaCie drive's light come on when connected?
  2. Does it appear in Disk Utility when you select "Show All Devices"?
  3. Does it appear under USB in System Information?
  4. What is the exact LaCie model, and is it connected directly by USB-C or through an adapter?


The most important thing is to establish whether your iMac can still detect the physical drive.


If it appears in Disk Utility, there is a good chance we can troubleshoot the mounting issue without losing your data.


Useful official references:




Originally posted at discussions.apple.com/thread/256391628