On 30 October 2020, Overdrive's security upgrades may result in some older devices losing access to the Overdrive website and Libby app. If you see a message about losing access to the Overdrive after 30 October, your device is affected by this change.
Due to the removal affecting a large number of users, Overdrive has restored access for macOS 10.6 (Snow Leopard) through 10.14 (Mojave) as of 2 October 2019. Mac users who upgrade to Catalina can enjoy audiobooks using OverDrive Listen in their browser when using the Overdrive website, or use the Libby app on their smartphone or tablet.