Requirement
You should have homebrew installed on your mac.
Installation
After you have installed homebrew on your mac, you can run the following command to install Spim on your mac.
$ brew install spim
How to use it
Open the Terminal at the folder you created your .asm file and enter
$ spim
Now you can run your assembly program like the following
Following is my assembly program
main:
li $t1, 1
add $t0, $t1, 2
li $v0, 10
syscall