R nightmare: Yosemite, R, RStudio, and Homebrew

Question

I use a MacBook Pro 13\" Retina (Late 2013) with OS X Yosemite 10.10.2. I wouldn\'t wish this upon my worst enemy. Well maybe.

Nightmare in chronological order:

Answer 1

Looking back at this issue, considering all the helpful comments and answers, regarding downloading R packages on a Mac with R and Homebrew already installed:

Do it in the R console within the RStudio interface, simply by typing install.packages("name of the package")

Since I had started downloading R packages directly in RStudio, I hadn't had any problems. The system is very happy.