Quark Software has released the El Capitan Update to QuarkXPress 2015. With the El Capitan Update, QuarkXPress 2015 now officially supports the new OS X 10.11.
The update is Mac-only and free for all current QuarkXPress 2015 users. It can be downloaded using the built-in Auto Updater in QuarkXPress or downloaded here (http://tinyurl.com/3rmaqwm).

In addition to supporting OS X El Capitan, the new update to QuarkXPress addresses known issues and includes an even faster start-up time. Internal tests have shown the El Capitan Update launches in just over five seconds, nearly 60 percent faster than the previous version of QuarkXPress.

Note that due to the extensive changes in the OS X El Capitan release, Quark doesn’t intend to provide support for running El Capitan on versions of QuarkXPress prior to QuarkXPress 2015. QuarkXPress 3-10 users who plan to migrate to El Capitan should upgrade to QuarkXPress 2015.