In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.
MacOS seems to not like some of the recent changes made to Citra, perhaps your current issue is related to that. To find out, please try out this older Citra version:
Download citra-osx-20200707-bd7ee8c.tar.gz from https://github.com/citra-emu/citra-nightly/releases/tag/nightly-1587
Extract it and then run the citra-qt executable found inside of the extracted folder.
Client Version Nightly 1697 HEAD-b3cab3c
Operating System macOS 11.2
CPU VirtualApple @ 2.50GHz
Graphics API OpenGL ?
Graphics Renderer ?
CPU JIT [x]
Hardware Renderer [x]
Hardware Shader [x]
Hardware Shader, Accurate Multiplication [x]
Shader JIT [x]
System Region -1
Shader Disk Cache [x]
I did not find anything wrong in your log file. Please wait for a moderator to assist.