Many issues with the installation of a Wolfram System can be fixed by resetting the Wolfram System’s preferences. Starting the Wolfram System with cleared preferences returns it to its default configuration by deleting and recreating internal files located in the Base Directory and the User Base Directory. You can find their locations on your computer by evaluating $BaseDirectory and $UserBaseDirectory in the Wolfram Language.
If you have saved anything to these directories, please back them up before performing a clean start. If you have edited any init.m files, they would be located in these directories.
After performing the clean start, the Wolfram System may need to activate again. You can access your activation information through the Wolfram User Portal.
The following instructions use Mathematica as an example. For other Wolfram products, replace Mathematica with the appropriate product name.


Windows

To perform a clean start on Windows, start the Wolfram System while holding down the Ctrl and Shift keys. Keep the keys held down until one of the Wolfram System’s screens appears. If this does not address the issue, you can perform a clean start manually by deleting the Base Directory and User Base Directory on the computer.

On Windows Vista, 7, 8, and 8.1, by default these directories are located at:

  • C:\ProgramData\Mathematica
  • C:\Users\<user>\AppData\Roaming\Mathematica

where <user> is your username on the computer.

These files may be hidden on your computer. You may need to enable your account to see hidden files.

Mac

To perform a clean start on a Mac, start the Wolfram System while holding down the Option and Shift keys. Keep the keys held down until one of the Wolfram System’s screens appears. If this does not address the issue, you can perform a clean start manually by deleting the Base Directory and User Base Directory on the computer. By default these are located at:

  • /Library/Mathematica
  • ~/Library/Mathematica

These files may be hidden on your computer. To navigate to a hidden folder, open the Finder application. Press Command + Shift + G to open a file search dialog and enter “~/Library/Mathematica/”. Finder opens the hidden folder.

Linux

To perform a clean start on Linux, start the Wolfram System by running the following in your terminal:

mathematica -cleanstart

If this does not address the issue, you can perform a clean start manually by deleting the Base Directory and User Base Directory on the computer. By default these are located at:

  • /usr/share/Mathematica
  • ~/.Mathematica



If this does not solve the problem, please contact Wolfram Customer Support for assistance.