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Warning Messages in "R" on Mac.

 When starting R (or using any IDE like RStudio), the following warning messages are displayed:

During startup - Warning messages:
1: Setting LC_CTYPE failed, using "C"
2: Setting LC_COLLATE failed, using "C"
3: Setting LC_TIME failed, using "C"
4: Setting LC_MESSAGES failed, using "C"
5: Setting LC_PAPER failed, using "C"

 To clear this error message, following the steps below:

1. Open terminal and enter:


   defaults write org.R-project.R force.LANG en_US.UTF-8

2. Restart R or R-studio.