This page explains how to use Informatics VPN with NetworkManager. See also OpenVPN for Linux (easy).
This probably works best if your distro already uses NetworkManager. If not, installing it may cause issues between it and netplan/systemd-networkd. Use your judgement.
Your password can be set in the Password Portal. This password must be unique. Your username looks like uun/ovpn.
This page explains how to use Informatics OpenVPN on a Mac.
(Summary: get admin rights; install the software; add the configuration files; connect.)
Some managed Macs already have Informatics OpenVPN set up. If yours does, skip straight to Connect.
The available Informatics client configuration consists of several short files, described below, which you should download and save as appropriate for your system. If you have AFS available you can copy these directly from /afs/inf.ed.ac.uk/group/inf-unit/OpenVPN/Config/; if not, you can download them from here (we recommend that you right-click on the individual links and 'save link as'). You may also find that emailing the files to yourself as attachments works as a way to download them to phones or other similar devices.
If there are platform-specific versions of the configurations you should use those in preference to the generic versions, as there may be additional tweaks intended to improve your experience.
If you just need to get to University sites from home, we recommend The University of Edinburgh VPN service. (See also: What is a VPN?)
Note: The University VPN will not work if you are connected to Eduroam.