The ridiculously anticipated Tweetbot for Mac is nowhere near its final stage yet but the developers have taken note of the incredible demand and so they probably decided to release an alpha version for now.
As you can expect, this version of the app will be buggy as it is still being developed but those who have used the app have already proclaimed it as the best Twitter client they have ever used.
Tapbot apps are known for combining great functionality with stunning design, which they brought to Tweetbot when they released it for iOS last year. Now Tweetbot for Mac carries on the same legacy and even adds support for the Retina display on the new MacBook Pro.
The app is free for now so you can try it out until the final paid version released on the Mac App Store. The developers will keep pushing updates for this app until the final version is released. Currently, there is no support for Notification Center and iCloud but that will be added in the final version. The current alpha works on both OS X 10.7 and 10.8 but the final version will drop support for 10.7 as it will utilize a lot of features found only in 10.8.
For more information, you can click on the link below. To download the alpha, click here.