Once the part numbers were revealed in the Mac rumor community, it was inevitable. On Tuesday morning, Apple announced the expected refresh to its ever-popular notebook line. The main improvements for both model lines include the newest 45 nanometer Intel Core 2 Duo processors known as “Penryn,” which promises better performance and longer battery life. [...]

Up till now, Mac users have been spoiled. Each and every release of Mac OS X has been shown to be demonstrably faster than its predecessor, whereas with Microsoft Windows it’s usually the reverse.
However, Leopard includes a huge amount of under-the-hood changes that tax the graphics processors fiercely, particularly on slower Macs. On the other [...]