The next major update to Apple’s OS X operating system, OS X 10.11, is expected to be previewed this June, at Apple’s annual Worldwide Developers Conference. We have a limited amount of information on OS X 10.11, but given that OS X 10.10 Yosemite just introduced a major design change, it’s likely OS X 10.11 will continue to offer the same general design, perhaps with under-the-hood improvements and new features.

The new design introduced with OS X YosemiteAccording to rumors, OS X 10.11 will focus heavily on bug fixes, optimization improvements, and security enhancements, much like iOS 9.

Specifically, Apple is rumored to be working on a new kernel-level security system called “rootless” that will help curb malware and protect sensitive data by preventing users from accessing protected files on their Macs.

Apple may also convert many IMAP-based applications like Notes, Reminders, and Calendar to its own iCloud Drive system, improving communication in these apps between devices and increasing security. A “Trusted Wi-Fi” feature may allow Macs and iOS devices to connect to trusted wireless routers with no additional security measures, while non-trusted routers would have a heavily encrypted wireless connection.

There will also be a few new consumer-facing features included in OS X 10.11. The Maps app may be updated with support for transit directions, and there are rumors suggesting the operating system will gain a new default font — San Francisco, the same font used for the Apple Watch. OS X 10.11 may also include a Control Center that was originally a feature rumored for OS X Yosemite. The Control Center would include music controls and other features similar to the Control Center on iOS, like access to Do Not Disturb, Wi-Fi, and Bluetooth.

With OS X 10.9 Mavericks, Apple ceased naming its operating system updates after large cats and instead announced plans to name future updates after major California landmarks.

We don’t know what Apple will choose to call its next operating system update, but the company hastrademarked a long list of possible names that could be used for upcoming OS X updates. Names cover several major landmarks in California, ranging from surfing spots and popular cities to mountains and deserts. There are even a few iconic California animal names throw in, like Condor, Grizzly, and Redtail.

The full list of names: Redwood, Mammoth, California, Big Sur, Pacific, Diablo, Miramar, Rincon, El Cap, Redtail, Condor, Grizzly, Farallon, Tiburon, Monterey, Skyline, Shasta, Sierra, Mojave, Sequoia, Ventura, and Sonoma.

Thus far, we’ve had OS X 10.9 Mavericks and OS X 10.10 Yosemite, one name focusing on a water-based location and another focused on a forest-based location. Apple may be picking names randomly, but it’s also possible the company will alternate between names that relate to water and names that relate to land.

Photo of Monterey, California, one of the potential names for OS X 10.11 or future versions of OS XIf that’s the case, we could potentially get another one of the ocean-oriented names, like Pacific, Monterey, Farallon, or Rincon, but it’s not clear if Apple’s following a specific naming scheme. There’s also the possibility that the company has other secret trademarks or trademarks it has not applied for protection on at the current time, meaning a name not even on the list could be chosen for OS X 10.11.

We’ve polled our forum members to find the names people preferred out of Apple’s trademarked list, and OS X Redwood came in first, followed by OS X Mojave and OS X Sequoia.

We may not know what OS X 10.11 will offer, but that hasn’t stopped our forum members from listing what they’d like to see in the next operating system update.

Many of our forum members have said they’d love to see Apple focus on speed optimizations and bug fixes rather than new features, but some requests include a smarter Spotlight window, Siri integration, a better Dark Mode, and an expansion of the Continuity features first introduced with Yosemite.

Want to share what you’d like to see in OS X 10.11? Join in on the discussion.

The number of visits we see to MacRumors from Apple IP addresses running pre-release software often gives us hints as to how development is progressing on upcoming updates.

Increasing visits to MacRumors.com from devices running OS X 10.11 from Apple’s networksVisits we’re receiving from devices running OS X 10.11 remain relatively low in the range of dozens per day, but we have seen visits picking up since the start of the new year, suggesting testing is well underway, as it should be as we head toward an initial unveiling and developer seeding in the coming months.

We expect to see the number of visits from machines running OS X 10.11 pick up as we creep closer to June. Apple will likely begin distributing the operating system internally to additional employees in the coming weeks to prepare for a preview at WWDC.

Apple previews each new version of OS X and iOS at its Worldwide Developers Conference, so we will likely get our first look at OS X 10.11 on June 8, when the company holds its WWDC keynote event.

After the keynote introduction, developers will be given access to OS X 10.11 for testing purposes, and following an extended beta testing period, OS X 10.11 will most likely see a public release in the fall of 2015. Apple’s been providing public beta testers with new versions of OS X, so testers may receive OS X 10.11 well ahead of a public launch.