mac/OS X is only supported by cpu hashcat ( https://hashcat.net/hashcat/ ), windows/linux instead are supported by all cats (cpu hashcat, cudaHashcat, oclHashcat).
Yes, the GPU may be faster than your cpu (given you are able to install a - proper/supported - operating system)
Cracking on laptops is not recommended, the heat etc may be a very important problem.
Cracking a password of length 69 is not supported, the limit for cpu hashcat/oclHashcat is 55 (and for some attack modes even less). Anyway, even if that limit wouldn't exist, cracking a password with length 69 is impossible, if the password is not very, very, very easy, or most of the characters of the password are known
Yes, the GPU may be faster than your cpu (given you are able to install a - proper/supported - operating system)
Cracking on laptops is not recommended, the heat etc may be a very important problem.
Cracking a password of length 69 is not supported, the limit for cpu hashcat/oclHashcat is 55 (and for some attack modes even less). Anyway, even if that limit wouldn't exist, cracking a password with length 69 is impossible, if the password is not very, very, very easy, or most of the characters of the password are known