Mac is even easier, since you have a bash terminal and curl!
Run Terminal and type
HTML Code:
curl --version
to test if you have curl installed.
If it is installed then execute
HTML Code:
for x in $(seq 1 148); do curl -o $x.jpg http://online.pubhtml5.com/vfof/guzu/files/large/$x.jpg; done
I am doing this with Linux, but it should work on Mac too.