Carthage iOS Setup
Carthage Installation Mac
Carthage Setup
Download the latest version of Carthage from the given link Download Link
Down in the Download section download the Carthage.pkg file.
Once the download is complete install it by double clinking on the download pkg file.
To check for successful download run the following command in your Terminal
carthage version
This should give the version installed like 0.18-19-g743fa0f