i am having the same problem but this fix isnt working. I am most likely a derp, heres wut i did:
1: made new folder called untitled folder and put techniclauncher inside
2: made textedit file, pasted the code and replaced [file name goes here] with untitled folder
3: saved as TechnicRun.command and put in the folder
4: typed chmod a+x then dragged technicrun.command into terminal and hit enter
it doesnt work. help please