Thank you very much for viewing. This is U&I Software Meta Synth 2.5 software for Macintosh. It's an unusual image synth and sound design software, said to be used by Aphex Twin and Richard Devine. I've had it sitting on a bookshelf since I bought it. It's been stored at home. No pets, no smokers. How about it for artists, those who love old Macs, or researchers? The "unregistered" notation means that it has not been installed or user-registered. It is not unopened. I don't have an environment to test the installation. I have confirmed that the CD-ROM disc's capacity is recognized on a Windows machine. ＜Operating Environment＞ Power Macintosh computer 64MB RAM Sound Manager™ 3.1 or later Mac OS 7.5 or later We do not guarantee whether authorization is possible. We recommend it for advanced users who can handle it themselves. The Japanese manual floppy disk is not included. An English manual booklet is included. 25 years have passed since the purchase, and the box and paper materials have age-related wear and staining. Please check the images. Thank you for your consideration.