[R-SIG-Mac] Continuous loop when using R on MacOS Sierra with 3.4.4 GUI 1.70 El Capitan build (7507)

[Andrew Beckett]

Dear All,

I've been using R on my home MacBook Air for the last 3 years, but recently installed on my work MacBook Pro. Both with 3.4.3 and 3.4.4 (version in subject line) I get a continuous stream of messages (in red) in the R console when I start R:

2018-03-18 11:57:25.151 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.151 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.152 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.153 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.154 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.154 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.186 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.186 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.187 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.188 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.222 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.222 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.255 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.255 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.288 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.288 R[23446:1805525] action changeColor:
2018-03-18 11:57:25.328 R[23446:1805525] action _forceClickMonitorDidChange:
2018-03-18 11:57:25.442 R[23446:1805525] action _forceClickMonitorDidChange:
2018-03-18 11:57:25.442 R[23446:1805525] action _forceClickMonitorDidChange:
2018-03-18 11:57:25.442 R[23446:1805525] action _forceClickMonitorDidChange:

Any idea what is causing this or how to fix it? I've searched with Google and also using the FAQ, plus the GitHub issues, and not found anything. It makes R unusable because any output I produce from any R commands just gets lost amongst the continuous stream of red messages. There's no clue at the top of the console - it just looks like this:

R version 3.4.4 (2018-03-15) -- "Someone to Lean On"
Copyright (C) 2018 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin15.6.0 (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

  Natural language support but running in an English locale

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

[R.app GUI 1.70 (7507) x86_64-apple-darwin15.6.0]

[History restored from /Users/andrewb/.Rapp.history]

2018-03-18 12:10:08.485 R[26425:1835450] action changeColor:
2018-03-18 12:10:08.485 R[26425:1835450] action changeColor:
2018-03-18 12:10:08.512 R[26425:1835450] action changeColor:
2018-03-18 12:10:08.512 R[26425:1835450] action changeColor:
2018-03-18 12:10:08.512 R[26425:1835450] action changeColor:
2018-03-18 12:10:08.512 R[26425:1835450] action changeColor:

Regards,

Andrew.

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