Hello!
Recently I started playing and was unable to play on my macbook pro.
I did some research and found how to fix it. This happens on most of the newer versions of Mac Os (Catalina and possibly lower version).
First off all the issue is caused because the rune-x client does not support the latest version of java.
First step:
U will have to complete remove Java from your computer.
U can do so by opening terminal. (To open terminal open finder and type "Terminal".)
Should look like this:
Second step:
is to paste this one by one in the terminal window by copying them one by one. (This will complete uninstall any java version of ur device)
sudo rm -rf /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
sudo rm -rf /Library/PreferencePanes/JavaControlPanel.prefPane
sudo rm -rf /Library/Application\ Support/Oracle/Java/
sudo rm -rf /Library/Java/JavaVirtualMachines
After placing the first one in it will ask you for the admin password. Simply fill that in.
Once you executed these 4 commands 1 by 1 ur machine should be Java free.
(If you are unsure if it worked type this in a new terminal window.)
java -version
Third step:
Download the supported Java version and install it.
Download Java 8 Update 261
Once you installed it you should be able to play again!
If you need any help doing this feel free to pm me ur discord and i'll help you true screenshare or call
Credits to Rogue for helping me figure most out!