The MacQuake3_116j_Beta.sea file you have requested: Official Patches / Mac / Quake 3 v116j Beta for Mac users - 387.49kb is not available. Perhaps try browsing all files for the game Quake III Arena and upload any files you want to share or are missing. This is the only information we could locate:
The newest version is Quake 3 116j Beta. You'll need version 116h Beta and then this executable on top.