Thanks, yet whats described on the link you prescribed earlier - there does not appear to be the ability to change the Media Transfer Protocol (MTP) in fact it doesn't (as above) appear to exist!
If the MTP enabled BlackBerry smartphone is not detected by the BlackBerry Desktop Software for Mac, perform the following steps:
Disconnect the BlackBerry smartphone from the Mac.
On the BlackBerry smartphone, navigate to Options > Memory.
Change the Media Transfer Protocol (MTP) option to Off.
Press the menu key, and Save the changes.
Connect the BlackBerry smartphone to the Mac"