Today at the WWDC Apple presented the all new Mac OS X known as Snow Leopard. A lot of improvements have been done but most of them only under the hood. Yes! More power and more speed.

The release date is planned for September (before Windows 7) and an upgrade will cost only $29. Considering Apple’s upgrade policy in the past will this be a steal.

So here is what you should know about the new Mac OS X:

1. Exposé reloaded

Exposé will be integrated in the Dock. Clicking and holding an application icon in the Dock will unshuffle all it’s windows. Stacks will be scrollable and finally navigation through folders inside a Stack will be possible (man, I was really waiting for that one).

2. Performance

Most of the code base has been rewritten to increase performance system-wide. PDFs are opened 1,5 times faster than before and JPEGs are loaded even twice as fast. Opening Mail will take only 50% of time. I can almost hear it roaring.

3. Full 64-bit and Multi-Core

The gained performance could be a direct result of the full 64-bit integration. All native Mac applications have been rewritten for 64-bit support.

4. Safari 4

The fast browser will get even faster. The Javascript engine has been improved by 50%. And  Safari 4 passes the Acid3 browser test (as the current beta does).

5. TimeMachine

Same goes for TimeMachine. There will be a performance jump up to 50%.

6. Smaller footprint

Snow Leopard will be more lean than the current version. The installation will save 6 GB of the hard disk. Nowadays disk space is really cheap (I can remember my first PC with a 170 MB hard disk) but it’s great for MacBooks where you cannot just add and add more hard drives.

7. More reliable disk eject

One of the situation I really hate about my Mac is when some application just stalls and you cannot eject the DVD or even worse if you cannot eject an USB drive. Snow Leopard will be able to show you the problematic application so you can shut it down completely.

Can’t wait to see my MacBook Pro with the new Snow Leopard in action.