Need some quick help here! DNT Optics HYDRA doesn’t connect with my MacBook via regular USB cable. Nothing shows up on my desktop or Finder. Is there a workaround or a quick fix that actually works for this? Has anyone here successfully pulled files onto macOS? I came across a few third party transfer utilities online, but I want to know if they are reliable before downloading anything to my machine. Thanks!
This is normal. macOS won’t recognize the thermal scope as regular USB storage because it identifies as an Android device. DNT Optics mentions this on its support page.
You’ll need an Android file-transfer app to access it from a Mac. I use MacDroid for transferring files between my Samsung phone and laptop. I haven’t tested it with the DNT HYDRA specifically, but since the connection works the same way, it should be a reasonable option.
The setup usually goes something like this:
- Open the optic’s developer options.
- Enable the Android developer settings.
- Turn on USB debugging.
- Connect through the app, select the appropriate Android version, and follow its prompts.
- Choose ADB or MTP mode, then select File Transfer when the device asks what kind of USB connection to use.
- Click Mount. The device’s files should then show up in Finder.
Once the initial setup is done, it’s fairly simple. You could also try OpenMTP or the newer Android File Transfer tool. If you get it working, post which app you used since that would be useful for other HYDRA owners.
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USB debugging should not be necessary just to copy recordings. That is for ADB access, and enabling developer options adds extra steps without fixing a basic MTP connection. The HYDRA has internal storage and appears to macOS as an Android device rather than a normal external drive.
Use a known USB data cable, power the HYDRA on, then open MacDroid and connect in MTP mode. Don’t expect it to appear in Finder until the transfer app mounts it. If MacDroid cannot see it at all, swap the cable first since many USB-C cables only carry power. A hub or USB-A adapter can be another failure point, so connect directly if your Mac has a suitable port.
Only try ADB and USB debugging if MTP fails and MacDroid specifically requests them. Once mounted, look through the internal storage for the photo and video folders, copy the files to the Mac, then eject the device before unplugging it.
Connect the HYDRA while it is fully powered on, then check its screen for a USB option and choose File Transfer/MTP. MacDroid should handle it without USB debugging. If macOS offers to initialize or format anything, cancel that prompt or you could erase the recordings. Use a confirmed data-capable cable, preferably connected directly to the Mac, then look in folders such as DCIM, Pictures, or Movies after MacDroid mounts the internal storage.
Developer options are the wrong fix for ordinary file copying. The HYDRA should not need USB debugging unless you are deliberately using an ADB connection, and changing Android-level settings can create more problems than it solves.
If you only need a few recordings quickly, skip the Mac connection entirely. Turn on Wi-Fi in the HYDRA’s connection settings, connect your iPhone or iPad to the Wi-Fi network created by the scope, then open the DNT app. The scope’s network does not provide internet, so an “Internet Unavailable” message is expected. Stay connected anyway.
In the app, open the album and browse the device files. Download the clips into the app’s local storage first, then save them to Photos or Files. From there, AirDrop them to the MacBook. This phone-to-Mac route is less elegant than direct USB, but it avoids MTP drivers and cable detection issues completely.
There are two catches. Wireless transfer can be slow with long thermal videos, and you need enough free space on the phone because the clip may temporarily exist both inside the DNT app and in Photos or Files. For a large batch, @ghost_golden_badger’s MTP advice is still the better approach: use a verified data cable, connect directly, and let MacDroid mount the internal storage.
Don’t bother looking for a removable card as another workaround. The HYDRA uses built-in storage, so a card reader generally is not an option. For a couple of clips, use the DNT app and AirDrop. For clearing the whole scope after a hunt, troubleshoot the wired MTP connection.
Don’t delete or “move” recordings directly from the HYDRA on the first pass. Copy them to a normal folder on the Mac, open a few clips to confirm they play correctly, and only then clear the scope.
The confusing part is that MTP is not the same as plugging in a flash drive. Finder may show absolutely nothing until an app such as MacDroid creates the connection. With the HYDRA powered on, use a cable that definitely transfers data, select File Transfer/MTP on the scope if that choice appears, then browse the internal storage through the transfer app. USB debugging should stay off unless the app specifically says it needs ADB.
I’d follow @ghost_golden_badger’s cable advice before changing any settings. A cable can charge the HYDRA perfectly and still carry no data, which makes it look like a software problem. Try another cable and remove any dock or hub from the setup. If the transfer app sees the HYDRA but the folders look empty, disconnect it, restart both devices, reconnect, and check folders such as DCIM, Movies, or Pictures.
For a couple of clips, the phone app and AirDrop route is probably less frustrating. For a full batch, wired MTP is worth getting working. Either way, treat the HYDRA as an Android device with built-in storage, not as a USB drive that macOS will automatically place on the desktop.
Nine times out of ten this is the cable, not the Mac and not the software. People jump straight to apps and developer settings when a dead data cable produces the exact same symptom, so @ghost_golden_badger and @joe39 are right to hammer that first. Grab a cable you know moves data, plug straight into the Mac, done before you touch any settings.
The whole developer options detour in the first reply is overkill for copying a few clips. USB debugging is an ADB thing, and turning it on just to grab video is the kind of change that leaves you with a scope acting weird later. MacDroid handles this in MTP mode without any of that, and honestly it’s fine for what it does, just don’t expect Finder to show anything until it actually mounts the storage. That trips up everyone the first time.
Where I land differently from the batch talk: for most people the Wi-Fi and AirDrop route @quantumwolf described isn’t the fallback, it’s the better everyday option. No cable roulette, no MTP driver mood swings. Yeah it crawls on long thermal clips, but if you’re pulling a handful of recordings after a session it’s less hassle than fighting a mount that half works. Save the wired MTP setup for the nights you’re clearing the whole scope at once.
Only run one Android transfer app at a time. MacDroid, OpenMTP, and Android File Transfer can fight over the same MTP connection, including background helper processes. If the HYDRA is detected but refuses to mount, quit the other apps completely, unplug it, reopen your chosen app, and reconnect with the scope powered on and unlocked.
If that still fails, check macOS System Settings under Privacy & Security for any blocked accessory or app permission. I agree with keeping USB debugging off unless you intentionally switch to ADB. For normal recording transfers, MTP should be enough.
Which macOS version and chip you’re on matters here, and nobody’s asked. On Apple Silicon Macs the old free Android File Transfer tool has been flaky for years, and MTP behavior differs from Intel machines. If you’re on a newer M-series MacBook, half the ‘it just works in MTP’ advice above quietly assumes it will, and it often doesn’t on the first try. Worth stating your setup so people stop guessing.
The cable-first crowd is right, and I’d go one step further. A lot of scopes ship with a short charge-only cable in the box, so the very cable that came with the HYDRA can be the exact thing sabotaging you. Don’t just grab ‘a’ cable, grab one you’ve already used to move actual files off a phone. That single check kills most of these threads.
On the app question, MacDroid in MTP mode is a fair pick for the wired route, and I agree with everyone saying skip USB debugging unless the app flat out demands ADB. One caveat @dilit25008 touched that I’ll hammer harder: install one transfer tool, not three. Having MacDroid, OpenMTP and Android File Transfer all present is a reliable way to get a device that shows up but refuses to mount, because their background helpers step on the same connection. Pick one, and if you’re testing another, actually remove the first.
Where I’d push back a little is treating Wi-Fi and AirDrop as the everyday default. It’s fine for two or three short clips, but thermal video files get large fast, and the scope’s own hotspot is not quick. For anything past a handful of recordings you’ll sit there watching a progress bar longer than the wired setup would have taken once. I’d frame it the other way from @binaryloop81: get the cable route working once, and keep AirDrop as the lazy option for the odd single clip.
Last thing people forget. Copy first, verify the files play on the Mac, then clear the scope. And if macOS ever pops up asking to initialize or format the device, cancel it. Don’t let it touch that internal storage.