# Introduction¶

After installation of R, additional steps might be require for MAC and Window users. Below are the instructions

# MAC Users¶

2. This is because MAC no longer ship the X11 package which is required by R to perform plotting.
3. Run xcode-select --install on your terminal
4. This will install the required zlib package on your system, which is required by PRSice (for decompressing bgen files)

# Window Users¶

As installation of R does not automatically add it to the system path, one will need to type the full path of the R.exe and Rscript.exe in order to use PRSice. To avoid this complication, we can manually add the folder containing the R binary to the system path:

## For Windows 8 and 10¶

1. In Search, search for and then select: System (Control Panel)
7. Click Browse and select the location of the executable of R. If you use the default installation path, you can add C:\Program Files\R\R-3.3.2\bin, where (eg.) 3.3.2 is the version number. Some installation might also have a i384 and x64 version and either one of those will work.
5. In the Edit System Variable (or New System Variable) window, add the location of the executable of R. If you use the default installation path, you can add C:\Program Files\R\R-3.3.2\bin, where (eg.) 3.3.2 is the version number. Some installation might also have a i384 and x64 version and either one of those will work.