Click this link to view your account's custom script: https://app.monitoringclient.com/installers/mac#scripted
Note that the version of curl in Mac OS X 10.5 does not support modern SSL certificates. Checking the 10.5 compatibility box adds the k flag, which bypasses certificate validation. While not recommended, it is valid for OS X 10.5 to 10.12+
The Watchman Monitoring Client is built with mass deployment in mind ,and can be easily deployed via tools such as Apple Remote Desktop, munki, DeployStudio, Puppet, etc. You can even script one-click installation with your Bomgar.