How do i manually update plex on mac

[CWallace]

There was a version that had an update problem.

Plex Media Server

Plex Media Server 1.1.2 is now available for Plex Pass members. FIXES: (Security) Devices authorized with the “networks allowed without auth” preference were unable to render images and play media when the server was signed in. (OS X) Fix issue with automatic updates. (Upgrades from 1.1.0 and 1.1.1 will require manual installation.)

Excerpt from that link:

• (OS X) Fix issue with automatic updates. (Upgrades from 1.1.0 and 1.1.1 will require manual installation.)