This OGS client actually the electron browser visiting the https://online-go.com site. It can remember the login status and create tray icon in the Desktop.
Logically this electron project should also support for MacOS, but I don't have it, so haven't tried that.
git is required to download this source code or you can download and extract from zip file provided by github.
Node.js required, download from https://nodejs.org/en/download/ and install the stable edition.
Then open "Command Prompt", type "cmd" in Start menu and run the following command.
- npm install
- npm run pack:electron
Setup files in electron_app/dist/, find the OS platform corresponding setup file, OGS Client Setup 0.0.2.exe.
Run OGS Client from start menu
Stop it via right click tray icon, select "Exit".