New versions of Mac OS require an adjustment to the security settings before installing Uplink.
If this pertains to you, the following error will display when attempting to install Uplink:
To install Uplink,
1) Download Uplink as normal (https://downloads.tricefy.com/tricefy_uplink/uplink4.pkg)
2) Access your System Settings
3) Go to the Privacy and Security settings
4) Scroll to bottom and select Open Anyway