Thank you for purchasing a ProSamples CD-ROM library disk! Your hard drive has a sub-folder inside the Emagic folder entitled "Sampler Instruments" that is used by the EXS24 sampler to access .EXS instrument files. When using ProSamples with the EXS24 Sampler on an Apple Mac computer, simply drag and drop the EXS folder from your ProSamples CD-ROM into this "Sampler Instruments" sub-folder. The EXS folder will then be copied to that sub-folder. Happy Music Making! The ProSamples Team