Hi Rain!
If you right-click on the file folder and choose "Get Info", does your user have read & write access?
And just to be 100 percent sure: you're not trying to run the client from within the compressed file, correct? IE, you've pulled the folder out of the compressed file and stored it locally on your machine?
Also, please feel free to hop in the
Gates of Time Discord Channel or pop by the
Gates of Time Forums for help.
Thanks!