hdiutil create -type SPARSE -size ${DMGSIZE:-"250m"} -fs HFS+ -volname "${LyxBase}" "${DMGNAME}"
# Unmount currently mounted disk image
- test -d /Volumes/"${LyxBase}" && umount /Volumes/"${LyxBase}"
+ mount | grep "${LyxBase}" && umount /Volumes/"${LyxBase}"
+ test -d /Volumes/"${LyxBase}" && rmdir /Volumes/"${LyxBase}"
# Mount the disk image
hdiutil attach "${DMGNAME}.sparseimage"