Minecraft 1.11 Pre-Release 1 Ready For Testing. Unlike conventional snapshots, pre-releases are generally considered to be a preview of the final product (in this case, 1.11). As such, there are no new features in this particular preview. There are a smattering of new bugfixes, which should be a welcome surprise for everyone who has diligently hunted down all of the various bugs introduced in 1.11 and prior. Awesome!
To get snapshots, open your launcher and press the “New Profile” button. Call it “snapshots” and check the box saying “Enable experimental development snapshots” and save. To switch to the normal version, you can select it in the dropdown at the bottom left corner of the launcher. Back up your world first or run the game on in a different folder (See the “new profile” dialog). Snapshots can corrupt your world, please backup and/or run them in a different folder from your main worlds.
Client: Download from Server 1 (.json)
Server: Download from Server 1