I’m trying to figure out the easiest way to transfer files between it and my Mac.
How do you usually connect it? What methods actually work? I came across Android File Transfer, but I’ve also seen people mention MacDroid. Since Garmin Overlander uses MTP, I’m wondering what the best option is these days.
What do you use?
The Garmin Overlander connects over MTP, so your Mac won't mount it like a normal USB drive. Android File Transfer was the usual workaround, but it's been abandoned and tends to be unreliable now. I wouldn't bother with it.
MacDroid is probably the more practical option. It supports MTP devices and lets you access them through Finder, so you aren't stuck using a separate file-transfer interface. You can copy files in either direction, which should cover GPX files, maps, and backups.
For firmware updates, try Garmin Express. It has some file-management features, but it's mainly intended for updates rather than browsing everything stored on the Overlander.
Don’t copy or delete Garmin’s installed map files by hand, even after a third-party app exposes the storage. Use MTP access mainly for GPX routes, tracks, photos, and backups. Put GPX files in the device’s GPX folder, disconnect the Overlander cleanly, then import them on the unit. Map and firmware updates are safer through Garmin Express or the Overlander’s built-in update system.
A charge-only USB cable can make this look like a Mac software problem when the data connection never existed. Try the original Garmin cable or another cable you know transfers data, connect directly to the Mac instead of through a hub, and keep the Overlander unlocked while it connects.
Don’t install an MTP app if you only need to move GPX routes. Import them through Garmin Explore and sync the Overlander over Wi-Fi, or use a microSD card.
@cloud_anna95 has the real shortcut here: pull the microSD, drop your GPX files on it with a card reader, and skip the MTP headache entirely. MacDroid is fine when you actually need the internal storage, but for routes alone it’s more app than the job needs.
Only one Mac app can talk to the Overlander at a time, so leaving Garmin Express or BaseCamp open can make MacDroid look broken. Garmin notes that you may need to close both apps completely before opening the one you actually want to use.
The confusing bit is that nothing necessarily appears on the Mac desktop, and the Overlander may not show a connection icon either. That does not automatically mean the cable failed.
I’d quit every Garmin or MTP app, unplug the device, reconnect it, then open MacDroid by itself. Transfer one small GPX file first before attempting a large backup. Use Garmin Express separately for updates, not at the same time.
Copying a GPX file onto the Overlander does not necessarily make it appear immediately in your saved routes. The file transfer and the Garmin import are separate steps, because apparently moving a file wasn’t complicated enough already.
For occasional route transfers, I’d use a microSD card or Garmin Explore sync. For regular access to internal storage, connect with a known data-capable USB cable and use an MTP app such as MacDroid. Don’t expect the Overlander to appear on the desktop as a normal drive. If MacDroid exposes it in Finder, that is the connection working.
After copying a GPX file, wait for the transfer to finish, eject or disconnect cleanly, then look for the import prompt or import option on the Overlander. Test with a single, clearly named file first. Names like Utah-trip-final-really-final.gpx are much easier to identify than six files called route.gpx.
I’d keep a separate folder on the Mac as the master copy rather than treating the Garmin as storage. MTP can be slow, and it is not a proper synchronization or backup system. Check that the copied file has a believable size before deleting anything from either side. A zero-byte or partially transferred GPX is technically a file, just not a useful one.
The advice about closing Garmin Express and BaseCamp matters too. I’d go further and avoid leaving MacDroid running when opening Garmin Express. Use one program, disconnect, then switch. Multiple apps competing for the same MTP device tends to produce the wonderfully informative result of nothing happening.
So the practical split is: MacDroid for browsing and copying internal files, microSD or Explore for quick route transfers, and Garmin Express for Garmin-managed updates. Keep manual file work away from installed maps and system folders.
Don’t edit a GPX file directly on the Overlander over MTP. Copy it to the Mac first, make your changes, then copy it back under a new name. MTP is not a normal mounted disk, and save or replace operations can fail without a useful warning.
If the device is not detected, check the USB section in macOS System Information. If the Overlander appears there, the cable and port are working, so focus on MacDroid or another MTP app. If it does not appear, changing software will accomplish nothing. Try another data cable or USB port.
For transfers, wait until the copy finishes, disconnect cleanly, and then import the GPX on the Garmin. Keep the original file on your Mac until you confirm the route opens correctly.
MacDroid makes sense for regular internal-storage access. For occasional GPX moves, a microSD card is less convenient physically but usually easier to troubleshoot.
Pull the microSD first and see how big it is before assuming that route is the easy path. Some Overlander units ship with a small card that’s mostly filled by map data, so there isn’t always free space to just drop files on, and reformatting it will nuke maps you actually want. If the card is basically full, you’re back to MTP whether you like it or not.
The microSD shortcut that @goldendev9404 and @cloud_anna95 pushed is genuinely the least fussy for GPX, no argument there. But I’d say people are treating it as a guaranteed escape hatch when it depends entirely on what’s on that card. MacDroid earns its keep exactly when the card route dead-ends and you need the internal storage, so it’s less ‘app you don’t need’ and more ‘app you keep for the day the simple trick doesn’t apply.’ For quick one-offs though, Explore sync over Wi-Fi skips the whole cable and card question, and that’s the part I’d try before plugging anything in at all.
Expect this to feel more like connecting an Android tablet than plugging in a thumb drive. The Overlander may take a while to appear, and Finder can sit there looking unhelpful while an MTP app reads the folder list. Give it a minute before unplugging and starting over.
For regular access, MacDroid is the sensible route. Connect with a data-capable cable, quit Garmin Express and BaseCamp, unlock the Overlander, then let MacDroid expose it in Finder. I’d copy files rather than drag them as a “move.” Confirm the copy arrived with the expected file size, then remove the original separately if needed. That is slower, but MTP is much less forgiving than a normal disk when a transfer gets interrupted.
There is a small Mac annoyance nobody has mentioned: Finder may leave files such as .DS_Store or names beginning with ._ in folders you copy. They are macOS metadata, not additional routes. They are usually harmless, but they can make the Garmin’s file browser look messy. Keep your GPX transfers in a simple folder and copy the actual .gpx files rather than dragging an entire Mac project folder full of previews and metadata.
For occasional routes, I agree that Wi-Fi sync or a microSD card is less bother. Internal-storage access is where MacDroid earns its place. Garmin Express should stay in its own lane for Garmin-managed updates. Whatever method you choose, keep the master copy on the Mac and treat the Overlander as the destination, not as your only archive.