If the map says 1.1, it is suggested that you should to switch to 1.1. YouTubers often put jumpcuts in their videos so you don't have to watch boring processes (such as changing the version). As far as I know, there is no way you can change versions by pressing a key, however I can show you how to change versions.

Follow the instructions of the link to change to 1.1. (I doubt going back to the earliest version with LAN will work)

Now you will have to make a server (it's not that hard):

1. Download a server jar for 1.1. I think this one might work.
2. Put it in a folder for the server
3. Open the .exe file in the folder and it should bring up a window that outputs a whole lot of text and a command bar beneath it
4. Wait for it to stop outputting lines and then type in stop.
5. The server folder now shows a lot of other files.
6. Delete the folder called world and replace it with the custom map, renaming it to world
7. Open the server.properties file with notepad
8. Type cmd in the Windows start menu
9. Type ipconfig in the black box
10. This shows multiple columns of your IP's. Find the group where it says something with ethernet or wireless at the top. Use Ethernet if present, it's usually faster (depending on your setup)
11. In that group, look for IPv4 and copy the IP address over to the server.properties file, where it says IP (it should look like: ip=xxx.xxx.x.x). Also write it down somewhere, you will need this later.
12. Reboot the server by opening the .exe file again. Wait until it says done.
13. On both computers, open up Minecraft and go to the multiplayer tab. Click 'Direct Connect' and type in the IP address you wrote down later.

Please leave a comment if it still doesn't work. Alternatively, you could play 241 and 241-2. They're kind of the same (maybe even more fun) and I think they're both for 1.8

Good luck and have fun!

edit1: I said to use cmd and ipconfig to find your ip but this is for windows only. On mac you can go in your system preferences, then network, and if you click on any of the connections it says under status which ip it has (If you have a connection with ethernet use that because it is faster than wifi).

or do it efficiently:

1: open minecraft launcher without clicking play

2: click either "new profile" or "edit profile"

3: click the version: selcection box and scroll down untill you see "release 1.1"

4: once done repeat those steps but scroll up and click the option you used before

5: if you unchecked a box and cant find the version you were using before then recheck that box that you unchecked (or do what i do and check all 3 and if you need to get to .minecraft search %appdata% in windows key+r)

also if you have the 3 checkboxes unchecked you will find the version faster

edit 1: also florens found a server for 1.1 and i tested it just move to the desktop: http://www.mediafire.com/download/ixvt54iydoiy6s4/Minecraft+1.1+Server+Download.rar

1.

They probably edit it, But To Switch Version Edit Your Profile Switch Your Version To Whatever Version Need

2.

Just Set Up A Server Here How Setting a server up in OS X is "more involved" than in Windows because an executable file has not been made available. A three step in-depth video tutorial of the process can be seen here. Keep in mind that the server won't run correctly on OS X 10.4 and may crash your machine.

Downloading Ensure you have the latest server application software. Look above for instructions.

Installing Java OS X already has Java downloaded onto your machine. Java is updated through Java's website If you are running OS X 10.8.* (Mountain Lion) or OS X 10.9.* (Mavericks) You need to download Java here, as Mavericks will fail when looking for it. no Java Download

Setting up the Minecraft server Ensure you have followed the download step before proceeding.

Create a folder, if you haven't already, and put minecraft_server.jar into it. For example, create a folder on the Desktop named minecraft_server and drag the jar file into it. Open TextEdit, set the format to plain text (Format > Make Plain Text), copy and paste in the following:

!/bin/bash

cd "$(dirname "$0")" exec java -Xms1G -Xmx1G -jar minecraft_server.jar nogui Save the file as "start.command" in the same folder as minecraft_server.jar. This will give the server enough RAM to run. The amount of RAM can be changed by editing the 1G to something else, such as 2G for 2 GB. Open Terminal (in /Applications/Utilities/Terminal). Grant execute permissions on file start.command to Owner, Group. and Public. To do so, type in chmod a+x , with a space after it; drag and drop the start.command file into the terminal window; and then press enter. (This gives run permission to the start.command script.) Double-click the start.command file to start the server. A new Terminal window will open and, the first time you run the script, several error messages about missing files/directories will appear. This is normal. You're now ready to configure your server.

Remember, {guy with longest message}, the guys don't have windows

ALTERNATIVE FOR MAC:

8. Open your browser (Safari)
9. Type to browser: ip.yegon.sk (Find a "Vaša IP"(underneath is you IP)) 9-2. Find in a Google: How to find IP in Mac (OS-X)
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