Hi Hien,
To adapt with new Appium 1.6 , we have to replace our core mobile to utilize XCUITest automation.
It’s not a quick fix at all unless you don’t use Mac OS Sierra for iOS testing. From our side, it will take time to resolve this
Also, the issue with opening Katalon Studio has been fixed in version 4.2. You don’t need to open it from terminal by using Katalon Studio 4.2