An anonymous reader quotes a report from 9to5Mac: AOL announced today that it is starting to cut off third-party app access to its Instant Messenger service. As first noticed by ArsTechnica, AOL began notifying users of at least one third-party app, Adium, that it would become obsolete starting on March 28th. At this point, it's unclear whether or not all third-party applications will be rendered useless come March 28th, but the message presented to Adium users seemed to strongly imply that: "Hello. Effective 3/28, we will no longer support connections to the AIM network via this method. If you wish to use the free consumer AIM product, we invite you to visit http://www.aim.com/ for more information." What this likely means is that AOL is shutting down the OSCAR chat protocol that is used to handle AIM messages. The service will, however, continue to be available via AOL's own chat app that is supported on macOS, Windows, iOS, and Android.