~/Library/Application Support/OpenEmu/PPSSPP/PSP/SAVEDATA/ How to Transfer Save Data from PSP to PPSSPP
Drag and drop the extracted folder (the one starting with ULUS or ULES ) into the PSP\SAVEDATA\ directory on your Memory Stick. save data test drive unlimited psp
If you want to skip the grind and access all cars and houses immediately, you can download community-made saves from sites like Download and extract the save folder (it should look like Verify the Region: save data test drive unlimited psp