Just some background. Have played ESO off and on since Beta. Yes I have a monkey for those in the know. Played on an iMac because back in the day the game was great on an iMac and then switched to PC when iMac support dwindled for a time. Do have some programming skills.
Fired up ESO on my new Mini M1 (what a potentially great little box). Could not get the mouse to work at all. Set sensitivity to minimum and camera would not settle down. I tried setting user settings.txt with minimal results. Yes I know how to adjust configuration txt files.
Then I launched the game directly from the program bypassing the launcher. It works great! This tells me there is a configuration file in the launcher startup containing a variable that is messed up. I'm still looking but am loosing my patience with the lack of info from ESO.
No Matt you don't have a massive OS/chip compile problem on the Mac M1. You have a "you let go anybody that understands txt setup files" problem. The native processor support was solved by much smaller publishers, like Eve and comparable publishers like WoW. Sorry for the vent, but go ahead and factually prove me wrong. So buy an ARM compiler or we will assume you are tacitly admitting that the game will be abandoned in a year or so.
How about this as a fix. Publish a list of all ESO config files for Mac with variable values and let you user base fix the problems. I will bet they have both the skill and time to fix these files. No, no-one can hack your game with info on configuration files. If they could then you're a... will not a very smart person.
Ok for those great forum members that have pulled this great game out of Oblivion over the years, do you know what the launcher is loading that breaks the mouse in the game? It appears that the launcher is loading some sort of interface file for the mouse (probably a Big Sur callout) that is incompatible. or even worse is calling out some in-house ESO code. Mouse is acting like an analog device with any movement continuing after the mouse stops. And please, I have read all the Catalina fixes. I'm on Monterey which is a completely different OS.
Thanks for any leads.