Apple has announced it has sold more than 2 million copies of Mac OS X Leopard since its release on last Friday. It also notch up a new record and it seems Apple managed to sell nearly 700,000 copies of Leopard per day. I wonder it is due to the improved performance of system-level that based on Mach kernel and the switch to Intel processors which greatly improved the performance of Mac’s visualization solutions have resulted in Macs being widely chosen in the consumer/developer market.