[R-SIG-Mac] [External] Please test R 4.0.4 RC

Richard M. Heiberger rmh @end|ng |rom temp|e@edu
Sat Feb 13 05:12:57 CET 2021

Using the intel R_4.0.4RC on the Mac M1.

Based on your recommendation I reinstalled XQuartz 2.7.11 instead of the 8.0.3beta.
X11() now does not work at all.

> X11()
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
  C-c C-c  C-c C-c

Force-Killing XQuartz from the Activity Monitor doesn't help. 
I have to Force-kill the R process.

From: R-SIG-Mac <r-sig-mac-bounces using r-project.org> on behalf of Simon Urbanek <simon.urbanek using R-project.org>
Sent: Friday, February 12, 2021 6:50 PM
To: R-SIG-Mac
Subject: [External] [R-SIG-Mac] Please test R 4.0.4 RC

Dear macOS useRs,

please test the latest R 4.0.4 RC builds from


especially if you are running macOS Big Sur. The known issues introduced by Big Sur have been fixed, but I cannot replicate nor test the spurious touchbar warning.

Also a reminder to *not* install XQuartz betas even if XQuartz ask you to - they are betas for a reason (=unstable) and break things.


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