Help with partial known simple OS X password

[dasgeek]

I switch to my Mac to get better performance. 

He is the command I tried:

./hashcat -m 7100 [path to hash.txt] -a 3 [path to cracked.txt] -1 xyz?d?d?d?d

Got an error "Generated bitmap tables...Invalid mask"

I know I am getting close. Any thoughts?