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+# uncomment the # before $ to enable PDF update automatically
+# see man latexmk for more info
+
+## Usage
+# latexmk -xelatex -gg -silent -pvc
+
+## Mac OS X - Skim
+$pdf_previewer = 'osascript -e "set theFile to POSIX file \"%S\" as alias" -e "set thePath to POSIX path of theFile" -e "tell application \"Skim\"" -e "open theFile" -e "end tell"';
+$pdf_update_method = 4;
+$pdf_update_command = 'osascript -e "set theFile to POSIX file \"%S\" as alias" -e "set thePath to POSIX path of theFile" -e "tell application \"Skim\"" -e "set theDocs to get documents whose path is thePath" -e "try" -e "if (count of theDocs) > 0 then revert theDocs" -e "end try" -e "open theFile" -e "end tell"';
+
+## GNU/Linux - Evince
+
+## Windows - Sumatra