Lacie hard drive not recognised since macOS update to 13.3.1

Have you installed and run any "cleaning", "optimizing", "speed-up", anti-virus or VPN apps on your Mac?

The current release of Ventura is 13.6.4. I suggest you update to that and see if there's any improvement to you problem.

Also give this a try: boot into Safe Mode according to How to use safe mode on your Mac and test to see if the problem persists. Reboot normally and test again.

NOTE 1: Safe Mode boot can take up to 3 - 5 minutes as it's doing the following; 

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts 

• Deletes font caches, kernel cache, and other system cache files

NOTE 2: if you have a wireless keyboard with rechargeable batteries connect it with its charging cable before booting into Safe Mode. This makes it act as a wired keyboard as will insure a successful boot into Safe Mode.

Go in to the disk utility application. Clic on View. Check view all devices instead of volumes and this will fix the problem. Enjoy!

Just had the same issue. The next command in terminal did the trick and HDD appeared in Finder:

sudo pkill -f fsck

Don't have a solution for this but I have exactly the same problem.

I updated my Mac to the latest MacOS Sonoma and it worked fin for the first couple of weeks, then all of the sudden when I plug in the light blinks, the cable is working but the external does not want to show up or connect.

Went to my work PC and it connected fine so it's not the cable or the LaCie itself.

Only conclusion that I can think of is that its a MacOS problem.

Hope Apple can fix this in an Update as I need the info on that hard drive for Final Cut Pro!

I have the 8Tb lace 2 big. It keeps ejecting all the time (running 13.3.1). Can't access it. Can't update firmware on it.

https://www.lacie.com/gb/en/support/kb/some-lacie-external-drives-randomly-eject-themselves-after-macos-catalina-update/

So tried to firmware upodate from the ^^ site. Walked through he terminal command changes.

Still not connecting properly. Lacie support does not answer...

There's been no fix to this bug from Apple. Sonoma 14.4 on my new Mac Studio doesn't mount my Lacie external drive. Monterey 12.7.4 on my MacBook Pro mounts it fine. The problem is Sonoma.

Try USC-C to USB -A cable and

Then USB-A to USB-C

I think there is a signal that gets lost (apparently a good thing ) going through the USB-A .

I had similar issue. Even in recovery !

@KevinMc718

Suggest you try my post of Jun 6'24, I.e.

mac -USB_C ---USB_A - USB_A---USB_C-external drive

Wish I understood how the posts get re/arranged :-(

I have gone through two brand new external drives. Both were formatted on my PC with Fat32. Yet neither of them even pop up on my mac mini running 14.2.1. Drive light comes on. I dont see it at all in Disc Utility. Whats funny is I have another 2T external drive hooked up and it works fine. Please help.

Same problem with my 1Tb Lacie drive. I can see it in Disk Utility but I have run disc First Aid and it comes up with "Could not mount AppleAPFSMedia"(com.apple.DiskManagement/disenter error 49218.) It still does not appear in the Finder side bar (not mounted). The drive has worked fine for over a year. Running Sonoma 14.2.1. At a loss on what to do. Perhaps try buying a new drive?

Apple needs to get it together and fix this. Honestly this update has messed my computer up in several ways, super frustrating. But this one is by far the worst. How are you not gonna fix a bug that prevents access to the most common hard drive there is?

I bought a brand new 4TB Lacie drive few months ago and transferred all my important data to it. Now that I try to connect it to my macbook, I just hear vibrations in the drive and the light is blinking, but I can't access the drive from my machine. Not sure what is happening.

I have a same problem with SSD

See for more info but no solution.

New external SSD not recognized on Ventur… - Apple Community  

Yes, this is correct and enjoyable for several minutes. The LaCie disk will disappear then.

apple m1 macmini 12.7

Lacie hardrive is will not mount! wack *** apple products per usual