I got this girl about a month ago and it was sold to me as an H. Mac, it’s about 2.5-3 inches and I can’t tell if the pattern on the abdomen is indicating that it is actually an H. Mac or if it’s actually an S. Cal what do you think
I agree, it's H. mac.
Although the leg width is useful, I find the ventral coloring to be the easiest way to tell them apart, especially in pics. By that size an S. cal will have a black ventral (females keep black ventral into maturity whereas mature males lose the black ventral). H. mac will be greyish/tan much like the dorsal colors.