AirPlay issues with QuickTime are widespread, especially w/Non-Apple AirPlay receivers
Try AirPlay-mirroring via Control Center instead.
Or try another media player with access to the same files, and AirPlay-cast from that.
Since Apple codes the AirPlay functionality for both devices (Roku and your Apple device), you'll have better luck contacting them: https://support.apple.com/contact
For those wanting an AirPlay solution that is compatible with Roku, and is fairly inexpensive, look at the ElMedia Player Pro application for Mac. a single license is $20 USD. I have confirmed this works with Roku. They even mention Roku support specifically in the release notes for version 8.
For Info start here: https://www.elmedia-video-player.com
By default the player is free, but a Pro license must be purchased to unlock features such as AirPlay support as well as more. Hope this helps.
Me too. 2022 June 5 and I am getting nowhere. A nightmare. Shame on Roku for making this a total nightmare. There goes an hour of trying I will NEVER GET BACK.
Roku Streaming can be Solved with Plex!
I have streamed my video library to my living room with Plex server. It works fine. I have done it, and its not that tough to do. https://www.plex.tv
You can download the Plex app on your Roku, then on your Mac have your Plex account point to a folder holding video files inside of it. Just make sure Plex stays running on your Mac in the background. It works fine and I have done it dozens of times.
Granted some of you may not want to download something extra I can assure you it works fine...
Really helpful, thanks! Screen Mirroring worked, but was slow and unwatchably choppy, with something like 2fps. I also couldn't get AirPlay streaming to work, as described earlier in this thread. But Plex works very well with the Roku device installed on my laptop.
TRUTH HURTS:
QUICKTIME on a MAC DESKTOP Computer is the only module that does not work on ROKU ! Apple confirmed it on the phone.
The average consumer suffers cause of TECH GIANTS !
It's totally stupid...there should be NO DIFFERENCE in function from an iPhone ,iPad to my MAC DESKTOP !
THEY SHOULD ALL WORK !! ROKU! APPLE!! get off you BUTTS and make it happen for all your loyal customers!!