Efficiency with cracking password

Hello guys, I'm cracking a Mac OS 10.8+ salted hash. Using my GPU I'm getting about 2100 H/s.

I used this webpage to get the admin hash code: 
http://tuukkamerilainen.com/how-to-crack...-password/

Is there anyway I can improve decrypting it? I'm using a 780ti.

I used this command in CMD:
cudaHashcat64.exe -m 7100 -a3 admin.hash ?u?l?l?l?l?d?d?d
(I'm assuming that it's 8 characters long.)


Reagrds,
blaze756