Unlike OS 9, OS X uses a virtual memory system that cannot be turned off. So what may seem like a performance problem in OS X may in fact be related to RAM. If you are experiencing dropouts without the "Slow Disk" message appearing to the left of the MIDI lights on Ivory's main page, then it's probably a RAM issue. RAM issues can also become apparent when other sample-based plug-ins (e.g. samplers or sampling reverbs) are used alongside Ivory. The following methods will reduce Ivory's RAM usage:

1. Turn off Release samples

2. Turn off Soft samples

3. Decrease Ivory's Buffer Size

4. Choose a keyset with fewer dynamic levels.