Wirelessly mirror your Mac screen & audio to Samsung and LG TV in **Ultra HD** quality.
Stream video files (two streaming modes) - locally seekable preview & video loop.
All TVs from mid 2012 to the latest 2017 QLED are supported.

- 12 predefined profiles: 480p...2160p (= UHD 4K) with frame rate ranging from 25 to 60 fps;
- Supreme video quality due to HW video encoder support (variable bit rate >20MBit/sec);
- Video-file streaming in 2 streaming modes (both allow video looping):
-- MPEG4 mode (MP4, MOV) with locally seekable preview (showing video as you drag slider);
-- Direct mode that allows to play any format that your TV supports (typically AVI, 3GPP, DIVX,FLV,MKV,..);
- Session recording: active session can be (in parallel) recorded to mp4 file and replayed later;
- Multi-display support (choose which display you want to cast to your TV);
- Low battery consumption & no buffering interruptions due to overloaded CPU (HW encoder support) (*);
- Optional adaptation of video stream to 16:9 (=TV) aspect ratio;
- 5 fully customisable user profiles (customisable quality with bit rate up to 60Mbit/sec@Ultra HD or up to 90fps@Full HD);
- Customisable lags (between what is shown on Mac and TV) for each profile;
- Dimming: computer screen can be dimmed while playing (e.g. a movie in a dark room);
- Time shift: if needed, video and audio can be offset +/- 1000 ms in 25 ms steps;
- Dedicated audio driver that allows to capture & transmit audio regardless of what source is playing;
- Displays current data transfer rate and used/free resources ratio;
- The app is free for transfers up to 3 minutes; unlimited transfers as a one-off in-app purchase.

(*) - The app needs a Mac model 2011 or higher.

Audio driver:

We currently support Samsung and LG, but the app shall work with most DLNA-compatible devices. If you help with a different TV brand, please send us an e-mail and we will try our best.

Note that:
- By default, you can cast your screen video (useful e.g. for showing photos, giving presentations, browsing web, etc). If you want to transfer also audio together with video, you will need to install Smartcast audio driver (instructions provided in the app).
- You can define the lag but you can't go below certain value given by the TV, typically 1.5-3 secs, i.e. the app is not primarily intended for real-time gaming.

What's New

Version 1.5.4

Fixed issue related to prevention of screensaver activation during active session.

Ratings and Reviews

3.1 out of 5

58 Ratings

58 Ratings

Awesome so far!


We have two computers, one a desktop and the other my little macbook. Our desktop did allow us to connect to the tv without any extra downloads but it would lag and eventually the screen would disconnect. We didn’t want to get the apple tv since we already have a ps4 and a smart tv. I read reviews for other apps that were supposed to stream to lg tvs and they were not good, complaining of crashing or just not working at all, and none allowed you to download the app for a trial to see how it worked first. I even went to LG website and downloaded the plex streamer or whatever they recommended and it never loaded, it would always say it was connecting, with no progress.

So I tested my luck and took back to the app store and I found this app that allowed you to try it out before buying the full version. It had great reviews and I figured I’d give it a shot and if it didn’t work, no foul. IT WORKED PERFECTLY and with literally no effort on my part. As soon as it downloaded and I launched it it automatically detected our tv. I love that you can either mirror your screen or play a file directly to the tv separately. I am currently watching a movie on the tv as I write the review on my computer. I obviously bought the full version immediately and it works exactly as I needed.

Early success, then bugs


The screen mirroring to my Samsung tv was beautiful BUT there was a syncing issue where audio and video did not match. After manually downloading the necessary separate audio driver, that problem was fixed. I enjoyed a pristine high definition video with audio on my TV. But beware, Smartest audio will override iTunes audio drivers (so you will have to go in and manually change that if you aren’t always mirroring to your TV). When I tried to delete the app, even after quitting the app, the app will not allow you to delete it by moving it into the trash.

Developer Response

Dear user, thank you for review. Let me add a few hints to your comments: (1) Audio driver: When a new session starts, the app swaps the currently selected audio driver with Smartcast audio driver so as it can capture audio and cast it to TV. When session ends, Smartcast returns the originally selected audio driver. If, for any reason, you terminate the app during the session, the Smartcast audio driver remains selected and you need to select the original audio output manually in the menu. (2) Deleting the app: Smartcast is a standard AppStore sandboxed app and does not have any means that would allow it to prevent deletion - i.e. when you terminate it, you can easily move it to trash. The problem could be with the Audio driver itself - you need to delete it separately. The way how to do it is described at the doc web page in the frequently asked questions (6th answer) here: (note that the how-to refers to /Library/... path and not to ~/Library/... path despite of the fact that Audio subdirectory exists in both). If you have any troubles, please explain your problem in an e-mail (

What an amazing app!

Dakota Horn

I couldn’t be more happy with my experience using this app. I had 1 small issue with the app, went to the website, contacted via email, and within 2 hours I had a prompt, relevant response that fixed my issue. Pavel is a dedicated app maker and the whole team is customer service oriented. I will continue recommending this app to all of my friends and family. There is a $9.99 in app purchase that allows you to use the full capacity of the app, it is 100% worth it. Thank you Smartcast, thank you Pavel, what an amazing app!!!


Pavel Kostka
20.1 MB
Age Rating
Rated 4+
© (C)2017 Pavel Kostka


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    With Family Sharing set up, up to six family members can use this app.

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