The internal CD burner on my desktop Mac OSX 10-7-5 is kaput. I bought a Dynamode external USB CD-ROM so that I could upload music from CDs and download onto blank CDs. The instructions with the Dynamode indicate that it is compatible with OS 10.4 and higher. However, I cannot make head nor tail of the user manual and need someone to take me through the installation procedure in easy stages. Would be grateful for any help. Thank you.