Neither I nor Taylor Hanayik (using a different computer) can replicate your issue. I do know that some users have reported that some browsers have issues with the NITRC download. The DMG file is notarized by Apple and is a Universal application that runs natively on the M1. Can you please try these commands:


1. Try dmg from here
https://www.nitrc.org/projects/mricrogl/

2. Try dmg from here
https://github.com/rordenlab/MRIcroGL/re...

3. Report OS version and hardware via this terminal command:

sw_vers
system_profiler SPHardwareDataType


-----------
Here is what Taylor reports for these steps. As he notes, even the lowest end 7-core GPU of the M1 MacBook Air has amazing performance. I would suggest for M1 users they choose the "Render Quality: Best" from the Preferences menu, as there is no need for the faster but lower quality modes. 


I have tried both download links. MRIcroGL installs, opens, and runs as expected using both links (the performance is incredible in render mode BTW). Maybe you can have the user post the output from sw_vers as well?

ProductName: macOS
ProductVersion: 12.0.1
BuildVersion: 21A559
Hardware:
Hardware Overview:
Model Name: MacBook Pro
Model Identifier: MacBookPro18,3
Chip: Apple M1 Pro
Total Number of Cores: 8 (6 performance and 2 efficiency)
Memory: 16 GB
System Firmware Version: 7429.41.5
OS Loader Version: 7429.41.5
Serial Number (system): L0JQT3H63D
Hardware UUID: D5F43FC3-FB01-51A1-8DB5-CCE160246595
Provisioning UDID: 00006000-000A49C821D2801E
Activation Lock Status: Enabled