While physical CD versions of Transparent Language's software can be found from third-party sellers, the company has largely moved to a subscription-based online platform. These legacy CD versions are designed for older operating systems.Transparent Language Complete Spanish (CD)Legacy CD packages for learning Spanish can still be purchased on secondhand online marketplaces like . These discs typically run on older Windows and Mac operating systems and may lack modern features.Features:Interactive lessons, quizzes, and games.Built-in vocabulary lists and verb conjugations.Voice recording features that allow you to compare your pronunciation with a native speaker.What version of Windows and/or Mac are you running? It is an older version of software so you probably need to run it on an older version of Windows/Mac. Do your due diligence before buying.