Hi Jeff, Looks like you have only bought the TDM Extension and ESB- which still requires a copy of Logic to function. Do you already have a copy of Logic (V5 I think is the compatible version)? Do you have Protools HD hardware? if (as I suspect) the answer is NO then what you have is essentially useless to you. The HD/ESB extension has been bundled with Logic for a while now- I hope you didn't pay much for it. Regards, Jim Richmond On 31 Jan 2008, at 04:24, Jeff Reynolds wrote: > Hello World, > > I couldn't resist, this being my first post. I recently picked up a > used > copy of Logic 5.0 Platinum in hopes to upgrade to Logic Studio. What I > received was a few boxes and a key. The two boxes are labeled PTHD > EXT & > ESB TDM. These are hybrid disks but have licenses for the Mac. What > Mac OS > will these run on and what older PT version? Would it be worth it to > invest > in an older PT HD/Mac system? Any suggestions for I/O hardware?. I > am a > computer tech for a large telecom and working on DAW's is my hobby/ > sideline. > I currently have the following rigs. A Macbook with Reason, Live and > Pro > Tools M-Powered and two PC's. One is running Sonar 6 on x64 and the > other is > running Cubase SX3 and Komplete 3. I enjoy using Macs the most and > Reason > for personal use but I like to tinker and learn older technology so > I can > understand where some of my friends and clients are coming from. > > Thanks! Jeff