TASCAM has discovered an incompatibility between Apple's "Tiger" OS 10.4 system software and Steinberg's Cubase LE v1.07 installer. For a successful install of Cubase LE, install it on your Mac first, then install Tiger. If you have purchased a new Mac with Tiger pre-installed, Cubase LE will not install. US customers should contact TASCAM Parts at (323) 727-7617 or parts@teac.com to receive a new installer disk that is compatible with Tiger. We apologize for any inconvenience.