There doesn't seem be a lot of good (modern/supported) solutions for the Mac in the 3270 emulation space.  Passport for Host Access on Windows is great, but let down by having to "remote" into a Windows Platform to run it.  I've seen plenty of "web based" emulator options offered, but running 3270 emulation in a browser tends to miss on the important productivity features, like good keyboard mapping, script support etc. I have had some success in the past with W.I.N,E and CrossOver (emulating the required (Windows) functions/APIs, but not an option due to security concerns at my shop. 
Is Rocket looking to port to a native client? - What is everybody else using, while we wait?

There doesn't seem be a lot of good (modern/supported) solutions for the Mac in the 3270 emulation space.  Passport for Host Access on Windows is great, but let down by having to "remote" into a Windows Platform to run it.  I've seen plenty of "web based" emulator options offered, but running 3270 emulation in a browser tends to miss on the important productivity features, like good keyboard mapping, script support etc. I have had some success in the past with W.I.N,E and CrossOver (emulating the required (Windows) functions/APIs, but not an option due to security concerns at my shop. 
Is Rocket looking to port to a native client? - What is everybody else using, while we wait?

Hi Eoin,

I work with the host access team and we have had some customers using Reflection Desktop, Reflection for the Web (in a browser), and Rumba on a Mac, but most used a Windows-based Citrix Server to host the emulator and the Citrix client on the Mac to connect.  This usually works well, as long as there are no Citrix bugs to prevent it from working correctly.  We had one issue which was resolved by using the latest version of the Citrix Workspace client, and the other was actually a Rumba bug (on Windows) which had to be fixed.

If customers had issues with using "Parallels Desktop" on Macs to run one of our windows-based emulators, they would have to prove to host access support that the same issue occurred on a real Windows device, in order for support to address it.  As far as I know, we have not had any calls on customers using Parallels Desktop, so it either just works, or is not being used much.

-Scott

I've never used the Mac version, but I have used the Android and Windows version of Mocha TN3270.  There is also x3270.  I've used the Windows version of that and did not really like it.  Biggest issue is I use a mod5 screen (27x132) and resizing the Window messed up the layout. 

Hi Eoin,

I work with the host access team and we have had some customers using Reflection Desktop, Reflection for the Web (in a browser), and Rumba on a Mac, but most used a Windows-based Citrix Server to host the emulator and the Citrix client on the Mac to connect.  This usually works well, as long as there are no Citrix bugs to prevent it from working correctly.  We had one issue which was resolved by using the latest version of the Citrix Workspace client, and the other was actually a Rumba bug (on Windows) which had to be fixed.

If customers had issues with using "Parallels Desktop" on Macs to run one of our windows-based emulators, they would have to prove to host access support that the same issue occurred on a real Windows device, in order for support to address it.  As far as I know, we have not had any calls on customers using Parallels Desktop, so it either just works, or is not being used much.

-Scott

Thanks Scott, Yes Citrix/WindowsApp to a Windows image, and Passport is my current daily driver - Latest Citrix still ahead of Microsofts WindowsApp, but they are catching up.  I think I last saw Rumba on Windows, but a Mac version is interesting, now I have a name I can "search it up".