Go to the Installations tab and click New installation .
To download Minecraft Alpha 1.2.6 , the safest and most official method is using the . Released on December 3, 2010, Alpha 1.2.6 marked the final update of the Alpha development phase. How to Download Alpha 1.2.6 Safely Minecraft 1.2.6 Alpha Download LINK
Open the Version dropdown menu. Scroll to the bottom until you find old_alpha a1.2.6 . Go to the Installations tab and click New installation
Small lakes and rare lava pools were added to both the surface and underground caves. Minecraft 1.2.6 Alpha Download LINK
It resolved a critical bug where items were "used" (like food being eaten) while simply opening a chest.