[2024] [deleted by user]

Hi, there's currently an issue with older versions of macOS that may be the cause of this error, so if you're playing on an older Mac please try updating your operating system to the most up to date version you can.

See this article for further info:

https://support.runescape.com/hc/en-gb/articles/26606111659281--10-JUL-Some-Mac-players-unable-to-login