Sorry, but we will only be supporting macOS 10.11 and above with RStudio v1.2. 10.9 (Mavericks) is quite old now; I'd recommend updating your OS if at all possible.
Sorry, but we will only be supporting macOS 10.11 and above with RStudio v1.2. 10.9 (Mavericks) is quite old now; I'd recommend updating your OS if at all possible.