Edit: This post was written before my previous post, but approved after I found the solution.
I am experiencing the exact same problem with the same error message since yesterday morning. I tried the tips in the linked threads, resetting all settings, reinstalled R and RStudio from scratch, but nothing helped. Currently, there is no way I can get RStudio to work at all. Any help is highly appreciated.
Crash report:
Crashed Thread: 22 Chrome_InProcGpuThread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
My machine:
OS: macOS Catalina version 10.15.7 (19H1519)
Model: MacBookPro10,2, BootROM 424.0.0.0.0, 2 processors, Dual-Core Intel Core i5, 2.6 GHz, 8 GB, SMC 2.6f59
Graphics: kHW_IntelHD4000Item, Intel HD Graphics 4000, spdisplays_builtin
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x802C, 0x384B54463531323634485A2D314736453120
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x802C, 0x384B54463531323634485A2D314736453120