The original software required a physical XSKey (dongle) for authorization.
Compared with modern DAWs, Logic Platinum 5.5 lacked some conveniences users now expect: streamlined plugin formats, modern sample libraries, high-track-count performance, and current OS compatibility. Users working today must run it in legacy environments or use later Logic Pro versions that inherit the spirit but not the exact codebase.
: Projects originally created in 5.5 can often be imported into modern Logic Pro 10.7+ Apple Support Community , or are you searching for a Windows-compatible DAW similar to the classic Logic workflow? Get Emagic Logic 5.5.1 Platinum - Apple Support Community
A fully professional, free DAW for Windows that shares some of the traditional workflow philosophies of early Logic versions.