Apple Releases First Developer Preview of Mac OS X Lion, Announces New Features

085118 mac os x lion mission control 500

Alongside new MacBook Pros, Apple today announced the release of the first developer preview version of Mac OS X Lion. First demoed last October, Mac OS X Lion is set for a public launch this summer.

Apple today released a developer preview of Mac OS X Lion, which takes some of the best ideas from iPad and brings them back to the Mac for the eighth major release of the world's most advanced operating system. Lion features Mission Control, an innovative new view of everything running on your Mac; Launchpad, a new home for all your Mac apps; full screen apps that use the entire Mac display; and new Multi-Touch gestures. Lion also includes the Mac App Store, the best place to discover, install and automatically update Mac apps. The Lion preview is available to Mac Developer Program members through the Mac App Store today, and the final version of Lion will ship to customers this summer.

Apple also outlines a number of other features to be found in Lion:

091845 mail

- Mail, a new version of Mail, with an elegant, widescreen layout inspired by the iPad; Conversations, which automatically groups related messages into one easy to read timeline; more powerful search; and support for Microsoft Exchange 2010;

091159 versions

- Versions, which automatically saves successive versions of your document as you create it, and gives you an easy way to browse, edit and even revert to previous versions;

091702 airdrop

- AirDrop, a remarkably simple way to copy files wirelessly from one Mac to another with no setup;
- Resume, which conveniently brings your apps back exactly how you left them when you restart your Mac or quit and relaunch an app;
- Auto Save, which automatically saves your documents as you work;
- the all new FileVault, that provides high performance full disk encryption for local and external drives, and the ability to wipe data from your Mac instantaneously; and
- Mac OS X Lion Server, which makes setting up a server easier than ever and adds support for managing Mac OS X Lion, iPhone, iPad and iPod touch devices.

An updated overview of Mac OS X Lion is available on Apple's feature page for the forthcoming update.

Update: Here are some additional features we've learned:

- In 10.7, windows may be resized from all edges and corners, and the resize indicator has been removed.
- Support for OpenGL 3.2 on capable hardware.
- Application persistance. Apps and their states are saved when you logout and back in. Background apps may be terminated by Mac OS X and will restore if the user picks them again. Basically the concept of open and closed apps is gone.

Popular Stories

iOS 26 on iPhone Feature

Here's When iOS 26 Rolls Out Today in Every Time Zone [Update: Out Now!]

Monday September 15, 2025 12:00 am PDT by
Update 10:06 a.m.: iOS 26 is rolling out now, though it may take a bit for all users to see it, so keep checking! Today's the day! Apple is about to release iOS 26, which will deliver the biggest redesign since iOS 7 and bring a range of new features and improvements to iPhones worldwide. It's Apple's biggest software update of the year, and Apple announced at last week's iPhone event that...
iOS 26 Battery Glass Feature

Apple Says Installing iOS 26 Might Impact Battery Life

Monday September 15, 2025 10:56 am PDT by
In the iOS 26 release notes, Apple is warning iPhone users that installing the new software might have a temporary impact on battery life, which is normal. A new support document explains that major iOS updates require background setup like indexing data and files for search, downloading new assets, and updating apps. Further, Apple says that new features could require more resources,...
Tim Cook Rainbow

Apple Reportedly Plans to Launch These 10 Products in 'Coming Months'

Sunday September 14, 2025 8:45 am PDT by
Apple's annual September event is now in the rearview mirror, with the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, iPhone Air, Apple Watch Series 11, Apple Watch Ultra 3, Apple Watch SE 3, and AirPods Pro 3 set to launch this Friday, September 19. As always, there is more to come. In his Power On newsletter today, Bloomberg's Mark Gurman said Apple plans to release many products in the...
AirPods Pro Firmware Feature

AirPods Pro 2 and AirPods 4 Get iOS 26 Features With New Firmware Update

Monday September 15, 2025 10:50 am PDT by
Apple today released updated firmware for the AirPods Pro 2 and the AirPods 4, introducing support for the new AirPods features that are included in iOS 26, iPadOS 26, and macOS Tahoe. The firmware has a build number of 8A356, and it replaces the current 7E93 firmware. With Apple's new software updates, the AirPods Pro 2 and the AirPods 4 support better audio quality for phone calls and...
iphone 17 lineup

iPhone 17 Models Launch on September 19 With These New Features

Friday September 12, 2025 7:58 am PDT by
Apple will launch its new iPhone 17 lineup and ultra-thin iPhone Air in stores on Friday, September 19, and the company has already shown off the new devices at its fall event, which ran with the the tagline "Awe dropping." The iPhone 17 series brings a host of new features and enhancements. Here's a rundown of the biggest upgrades and changes: iPhone 17 Display Changes The iPhone...
iOS 26 Feature

iOS 26 Available Now With These 8 New Features

Monday September 15, 2025 5:45 am PDT by
Following three months of beta testing, iOS 26 was released today, September 15. The update is compatible with the iPhone 11 series and newer, and it is available to install via the Settings app, under General → Software Update. Below, we have highlighted eight new features included in iOS 26. Even more new features and changes are outlined in Apple's release notes for the update. Some of ...
iPhone 17 Pro Air Boxes

iPhone Air and iPhone 17 Pro Boxes Revealed

Sunday September 14, 2025 1:36 pm PDT by
T-Mobile President Jon Freier today shared real-world photos of Apple's boxes for the iPhone Air, iPhone 17 Pro, and iPhone 17 models, which launch on Friday. Image Credit: Jon Freier Apple has typically included iPhone box renders in its product environmental reports, but it did not do so for the latest models. However, Apple's iPhone Upgrade Program page does offer some images of the boxes, ...

Top Rated Comments

johnalan Avatar
190 months ago
Another thing, I think launchpad is cute, but again, We already have Folders, so having an additional analogous folder implementation ala iOS seems to be pointless to me.

I'd be very interested in how this is implemented in the file structure, can anyone with Lion dev release comment on how 'Folders' you create in launchpad are in the actual underlying directory structure?

Really glad Terminal is still there! Important to lots of ppl who enjoy and require the underlying UNIX subsystem.

Maybe that it has a fullscreen mode means it's there to stay!
Score: 1 Votes (Like | Disagree)