ntrview-wiiu VS citra

You can kind of with NTRView. It sends your "New" 3DS gameplay to your Wii U's screen.

You can stream your 3ds through the gamepad and tv with ntrview. There is some input lag but a game like that wouldn't matter too much, and the sound only comes out of the 3ds. https://github.com/yawut/ntrview-wiiu

Thirdly, download and install NTR View on your Wii U : https://github.com/yawut/ntrview-wiiu

Set up NTRView on your Wii U, then install BootNTR via Universal Updater on your 3DS, launch 3.6, then open Rosalina Menu and start InputRedirection. Open NTRView on your Wii U and put in your 3DS' IP, displayed on the bottom screen.

I do wish we can use the Wii U Gamepad on the Switch. I've been using it to play 3DS games through ntrview-wiiu and it's pretty comfy for longer play sessions. Prop the 3DS on a phone stand though since the streaming quality is mediocre, I'm only using it for controls.

https://github.com/yawut/ntrview-wiiu And a modded New3/2ds with NTR cfw

This method requires you to first install CFW, then use Nanquitas' custom 3GX Loader Edition of the Luma3DS boot.firm to allow you to run BootNTRSelector, which you can then view with Snickerstream (or NTRView if you own a Wii U). This particular method (via NTR) only works on New models, but there is an alternate (and now deprecated/unsupported) method for Old models.

The alternative to a physical capture card is the CFW WiFi streaming method. This requires you to first install CFW, then use Nanquitas' 3GX Loader Edition of Luma3DS to allow you to run BootNTRSelector, which you can then view with Snickerstream (or NTRView if you own a Wii U). This particular method (via NTR) only works on New models, but there is an alternate method for Old models.

You need to run NTR-CFW on the 3DS (use BootNTRSelector, but note that it doesn't work with current Luma3DS, so you may need to install a different version to use it). You should also enable InputRedirection in Rosalina (opened by pressing L+Down+Select--InputRedirection is under "Miscellaneous options..."), which will allow you to control the 3DS with the Wii U GamePad. Then, start ntrview-wiiu on the Wii U and enter your 3DS's IP address, which you can find in Rosalina.

Doesn't cover 3DS (Citra)

Another wonderful option is to play Nintendo 3DS games with the Citra emulator. They look incredible. I would go so far as to say that if you're a fan of the console then this is the best way to experience its games, even better than on the original hardware. Again use 3840x1200 @ 60 Hz and full SBS. In Emulation -> Configure... -> Graphics -> Stereoscopy set it to "Side by Side". Also increase the renderer internal resolution to as high as your PC can handle (I used "5x Native"). We'll also have to set the display layout for our resolution and aspect ratio. Unfortunately, this has to be done manually. Browse to %APPDATA%\Citra\config and edit qt-config.ini with this in the [display] section:

After some more research, I discovered that the Citra devs discovered and fixed this issue by allowing the Back button to open the in-emulation menu. This fix was added on Jan 22 2023. When I checked the version of Citra available on the Google Play Store on my phone, it was a very old version from May 2021, which is strange because viewing the same Play Store page on my computer shows it was updated in April 2023... maybe your Play Store version is also outdated? If so, the only solution I can think of would be to install the apk from the Citra Nightly github repo.

https://citra-emu.org/ A 3ds emulator!

You might want to consider compiling it on your Mac yourself, rather than trying to download a build, given the situation with MacOS transitioning to ARM. Beyond that, your question is related ton emulation, not ROMs specifically, so if you still need help, ask on related subreddits like r/EmulationOnMacOS and r/CitraEmulator.

https://citra-emu.org/ just typing the console + emulator on any search engine should give u the best option most of the time

I used the one here (you need a github account): https://github.com/citra-emu/citra/actions/runs/5078058438

There have been several recent changes merged for custom textures. Here is one of the pull requests for example: https://github.com/citra-emu/citra/pull/6452. The slow loading you're talking about was only an issue for me if preload custom textures was enabled.