AC keeps quiting [mac][non-ranting thread]

[Skipslikeapansy]

When I press play
ac crashes and I get an error message that says "ac has quit unexpectedly"
this is the report can anybody help Pleaseeeee

Process: assaultcube [345]
Path: /Users/David/Downloads/assaultcube-1/AssaultCube.app/Contents/gamedata/assaultcube.app/Contents/MacOS/assaultcube
Identifier: assaultcube
Version: ??? (???)
Code Type: X86 (Native)
Parent Process: launchd [1]

Interval Since Last Report: 16650 sec
Crashes Since Last Report: 1
Per-App Interval Since Last Report: 0 sec
Per-App Crashes Since Last Report: 1

Date/Time: 2013-12-11 20:51:59.089 +1100
OS Version: Mac OS X 10.5.8 (9L31a)
Report Version: 6
Anonymous UUID: 9827EC5B-DD90-46DE-921F-9FD436E1C8C5

Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 0

Dyld Error Message:
Library not loaded: @executable_path/../Frameworks/libcurl.framework/Versions/Release-7.30.0/libcurl
Referenced from: /Users/David/Downloads/assaultcube-1/AssaultCube.app/Contents/gamedata/assaultcube.app/Contents/MacOS/assaultcube
Reason: no suitable image found. Did find:
/Users/David/Downloads/assaultcube-1/AssaultCube.app/Contents/gamedata/assaultcube.app/Contents/MacOS/../Frameworks/libcurl.framework/Versions/Release-7.30.0/libcurl: unknown required load command 0x80000022
/Users/David/Downloads/assaultcube-1/AssaultCube.app/Contents/gamedata/assaultcube.app/Contents/MacOS/../Frameworks/libcurl.framework/Versions/Release-7.30.0/libcurl: unknown required load command 0x80000022