I downloaded the pre-built binary from the GitHub Releases page (goad-osx-x86-64.zip)
I ran the executable file from my downloads window
/Users/ispasha/Downloads/goad ; exit;
Imaads-MBP:~ ispasha$ /Users/ispasha/Downloads/goad ; exit;
No URL provided
usage: goad [] []

An AWS Lambda powered load testing tool

Flags:
-h, --help Display usage information (this message)
-n, --requests=1000 Number of requests to perform. Set to 0 in
combination with a specified timelimit allows
for unlimited requests for the specified time.
-c, --concurrency=10 Number of multiple requests to make at a time
-t, --timelimit=3600 Seconds to max. to spend on benchmarking
-s, --timeout=15 Seconds to max. wait for each response
-H, --header=HEADER ... Add Arbitrary header line, eg.
'Accept-Encoding: gzip' (repeatable)
-m, --method="GET" HTTP method
--body=BODY HTTP request body
--json-output=JSON-OUTPUT Optional path to file for JSON result storage
--region=us-east-1... ... AWS regions to run in. Repeat flag to run in
more then one region. (repeatable)
--run-docker execute in docker container instead of aws
lambda
--create-ini-template create sample configuration file "goad.ini" in
current working directory
-V, --version Show application version.

Args:
[<url] [http[s]://]hostname[:port]/path optional if defined in goad.ini

I then try to run the goad command, but my terminal window tells me that the goad command is not found.
I've spent the last couple of days trying to figure it out on my own but I'm stumped.