Hardware suggest

I'm planning to use my Mac for password cracking it has a GT750M-1GB GPU and CPU of Core i5 2.9(haswell).
I know using hashcat against oclhashcat for brute-force method is not good practice... so the answer i need to know is about "GT750M-1GB GPU", Does it perform well or i need to use a better GPU?

note: the password i need to crack has 69 length