Zotero works on Mac, Windows, and Linux. After downloading Zotero, do not forget to install the connector for your favourite browser: Chrome, Firefox or Edge. For Mac users, the Safari connector is bundled with Zotero and can be enabled from the Extensions pane of the Safari preferences.
Using Zotero Without Installing It
ZoteroBib is a free service that allows you to create a bibliography instantly from any computer or device (including mobile devices) without having to install the program or create an account.