Hi LDChen nice to see you , heres a link thanks to Mr Spiv that youll want to check out
Precompiled binaries of Oopo's GCC toolchain dated 20050625 and PSPSDK 1.0 beta for Mac OSX. Download the dmg (31 megs) or the tar ball (23 megs). The toolchain and the sdk installs under /opt/local/pspdev/. The tar MUST be extracted under /opt/local/.