EDIROL UM-1 Driver Ver.2.1.0 for Mac OS X For Product(s): UM-1 / UM-1S / UM-1X / UM-1SX / UM-1EX This is a driver for using the UM-1 on Mac OS X. Compatible with Apple`s standards of CoreMIDI Universal Binary This driver can work on both CPU, Intel processors and PowerPC processors. Single/Dual processor suppor For Operating System(s): MacOSX