Press Cmd + Shift + G in Finder and type ~/Library/Application Support/minecraft . Locate or create a folder named mods .

The 1.21 update isn't just a port; it integrates the new combat meta.

The primary version mentioned in the context of Minecraft 1.21 is the 0.5.8 series. However, a significant point of confusion has emerged from the development builds. Users have reported that the dev builds from the 0.5.8 series, such as 0.5.8-2160 and 0.5.8-2165 , are built to require Minecraft 1.21.1 , not the base 1.21 version. This mismatch has caused crashes and start-up problems for players trying to run it on the older 1.21.