The help.start() command in R for the Mac doesn't start up using the default browser. It seems to prefer Internet Explorer, no matter what the Internet Settings are. To make matters worse, if the browser option is set within R, the applescript() command uses an (applescript) alias to start the browser. This causes AppleScript to ask where the browser is each time. Ugh.Fix:
R.homeis the folder containing R.
Now everything should be fine.