there should be a file "Library/Application Support/Dolphin/Config/Dolphin.ini"
renaming/moving to another folder temporarily and test with any version except the 4 that I know willl not work (3.0-583,3.0-584,3.0-585,3.0-586).
if that works, check in that file under the section [Core] list what MemcardA is set to
renaming/moving to another folder temporarily and test with any version except the 4 that I know willl not work (3.0-583,3.0-584,3.0-585,3.0-586).
if that works, check in that file under the section [Core] list what MemcardA is set to