can't download garmin computers

[Buddy Mckinney]

I have tried to multiple times to download my Garmin Computers. I have a MK2i and and X50i. I have have attempted to download both of them without success. I have tried both a USB A and a USB C charging/sync cord. When I try to download the computer it does not show a device or mount point. The explorer button does not show the computer but it is visible in windows explorer. I have tried clicking all of the buttons in the options and I have tried clicking none of the buttons. I get the same results from both computers. I have confirmed that the computers are able to be imported as they both successfully imported to Diving Log 6.0 without issue. I would prefer to use Subsurface as I have used it for several years and it shows me the information that I want to see. Is there a fix for this issue? I am including a screenshot of my most recent attempt. This was with the X50i and I had checked about half of the options buttons. 

[andrew.tr...@gmail.com]

Here is how I get my dives from my Garmin Descent G2 to Subsurface (and it worked with my Descent Mk1 before that) on my Mac.

I have a folder on my Mac called Garmin Logs. I download the logs from Garmin Connect to this folder and unzip them.

I have another folder in my user directory called Garmin and I have an Alias (symbolic link) called Activity which points to Garmin Logs.  (Note that you could just as easily just have an Activity folder under Garmin in your user folder but mine is historical on my computer).

In Subsurface I choose Import->Import from dive computer and select Garmin for Vendor, and "Decent Mk2(i)/Mk3(i)(S)/G1/G2/X50i" for Dive computer, and my user folder for Device or mount point

I check Force download of all dives and then click Download. It loads all the dives in my Garmin Logs folder (AKA /users/me/Garmin/Activity). I then click Unselect all, scroll to the end and select the newest dive, and click OK.

Works like a charm.

The same should be possible on a Windows computer.

Andrew.

[miika....@gmail.com]

It has been a bit tricky for me to select correct mount point for Mk2i, but downloading directly to Subsurface (on Linux) works once that part is figured out. You will need to choose the correct location where the DC is available on "file system" as shown in this screenshot

Path will obviously be different on Windows, but you get to browse through the filesystem by clicking the three dotted button on the right of the Device or mount point field.

HTH

[andrew.tr...@gmail.com]

By the way, have you tried closing/killing Garmin Express? It is likely stopping anything else getting to the device.

On Wednesday, 31 December 2025 at 15:38:48 UTC+11 Buddy Mckinney wrote:

[Dirk Hohndel]

The MK2 will show up as MTP device by default and it's actually far easier to download from it using MTP instead of mounting the filesystem. Subsurface will do so on all three OSs, unless you already have an MTP handler running (it's like Highlander... There Can Only Be One)

The Mk1 and Mk3 aren't MTP devices, but they should both mount automatically without needing tools to do so

/D

[Michael Keller]

On 31/12/2025 20:20, 'Dirk Hohndel' via Subsurface Divelog wrote:

> The MK2 will show up as MTP device by default and it's actually far
> easier to download from it using MTP instead of mounting the
> filesystem. Subsurface will do so on all three OSs, unless you already
> have an MTP handler running (it's like Highlander... There Can Only Be
> One)
>
> The Mk1 and Mk3 aren't MTP devices, but they should both mount
> automatically without needing tools to do so

You definitely don't need tools to mount the Mk1, but it still requires
the user to double click on the device in the respective file explorer,
unless the operating system is set to mount USB storage devices
automatically when they are detected...


Ngā mihi

  Michael Keller

[Buddy Mckinney]

Does anyone know how to find it on the file system Windows explorer shows the computer but subsurface does not. 

[Buddy Mckinney]

i have

[Buddy Mckinney]

I have. I have tried it on a computer that has never had Garmin express evern installed on it with the same results.

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[andrew.tr...@gmail.com]

Does Subsurface for Mac have a built in MTP handler?

I can't get my Garmin Descent G2 to work directly with Subsurface. If I download the FIT files from Garmin Connect to a Garmin/Activity folder it works fine but  not natively.  What do I need to have the Mount Point set to?

The G2 does not show up in finder.  If I use OpenMTP, I can see the G2 but only if I set MTP Mode to Kalam Mode. Legacy Mode won't work.

I have Quit the Garmin Express Service in all the above cases.

[Buddy Mckinney]

i got my mk2i to import into a macbook without any issues

[Buddy Mckinney]

ok i've tried updating drivers, i've tried finding the mount location (no luck) garmin does not mount like a drive. Garin express is shut down. Both computers are visible and accessible in windows explorer, both will import into Diving logs. The mk2i will import on a macbook the x50i will not(error is no new dives found). This is incredibly frustrating. any suggestions before i give up.

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[Dirk Hohndel]

One thing that really helps people answer questions is specificity.

I understand that a lot of people here are first and foremost divers. But if you call a car repair place and ask "does my car have an injection pump", what do you think the first question will be?

Maybe "which car are we talking about?" ??

Anyway, I digress.

There were a number of Subsurface for macOS releases that for odd reasons were missing the MTP downloader. The current release 6.0.5504 does include the MTP downloader.

(as a general rule... if something doesn't work for you... make sure you use the latest current release... and at least consider giving the 'latest' release a try)

So. For Garmin Descent Mk2 on a Mac using Subsurface-6.0.5504 the process is simple.

(1) connect the Garmin Descent Mk2 via USB. It will say "Connect with MTP?" on it's screen. Select YES
(2) observe if any app autostarts. there are a couple of older Android connect apps, MP3 player apps (yeah, I know), and some other apps, including at least one from Garmin that may autostart and grab the device. If that's what happens, UNINSTALL THAT APP. Subsurface CANNOT access the dive computer if something else grabs it first
(3) start subsurface, open cloud storage (or your local data file), hit Command-D, select Garmin and Descent Mk2... and click Download.

This will work. If it doesn't. Do a screen video of the whole process, starting BEFORE you plug in the dive computer and ending with the error you get and post it here.

/D

[andrew.tr...@gmail.com]

Thanks, Dirk!

I had 6.0.5414 which must one of those that was missing the MTP downloaded.

Once I installed 6.0.5504 (and quit Garmin Express Service) it worked fine.

Note that mine is the Garmin Descent G2 not Mk2. It doesn't ask about connecting with MTP unless the default connection mode is Garmin. Mine is set to MTP so it never asks.  All I have to do is quit the Garmin Express Service and it works fine.