Performance improvements mainly involve virtual memory - this includes dealings with large applications and accessing SCSI devices.More reliable use of sound-intensive application programs for Macintosh Quadra and Centris systems which have been updated with Apple's Power Macintosh Upgrade Card.Data integrity enhanced when accessing a Macintosh Performa 5400 series system over the network.Network made more trouble-free with the Macintosh Performa 54 series.One cause of Type 11 system errors were eradicated on PowerPC-based Macs.Improvements in the reliability of the remote control included with the Macintosh TV and Macs with Apple TV Tuner Cards.