Apple’s latest media event kicks off tomorrow, October 27, at 10am Pacific/1pm Eastern. After focusing primarily on the iPhone and Apple Watch at its event in September, Apple is expected to dedicate this one mostly to its aging Mac lineup.

This will be Apple’s first onstage mention of Mac hardware since March of 2015, when the company unveiled its one-ported Retina MacBook. The only Mac updates to happen since then—the 2016 refresh of the MacBook and new 4K and 5K iMacs—were introduced more quietly via press releases and early reviews.

The MacBook Pro is expected to be the event’s biggest announcement, and Apple itself has already leaked significant details about the laptop. It has a customizable OLED touchscreen in place of the row of function keys, and there’s a Touch ID fingerprint sensor for authentication and Apple Pay. Aside from the 13- and 15-inch Pros, Apple is expected to announce another laptop in either the MacBook or MacBook Air families, and the company could potentially make announcements about the iMac and its other desktops.