Mac OS X Lion Building in Support for Super High Resolution 'Retina' Monitors


Today, Apple seeded Mac OS developers with the first preview of Mac OS X Lion. Apple has outlined a number of new features such as new Mail client, document Versions, and much more.

But one particularly interesting under-the-hood change that we've learned about is an evolution of Mac OS X's "resolution independence" features. Resolution independence has been a long talked about feature that would eventually provide support for high DPI (dots per inch) displays. While there has been the beginnings of support for it starting in Mac OS X Tiger (10.4) and into Mac OS X Snow Leopard (10.6), full support was never realized. In Mac OS X Lion, however, references to Resolution Independence has been replaced with a new system that could pave the way for these super high resolution "Retina" monitors.

Taking cues from iOS, Apple has reportedly built in support for what it calls "HiDPI display modes". These HiDPI modes allow developers to supply 2x-enlarged images to support double-high resolution displays. Like the iPhone 4's Retina Display, this means that user interface elements will remain the same size, but everything will be twice the resolution and therefore twice as detailed. For example, instead of a 1440x900 pixel 15" MacBook Pro, you could have a 2880x1800 pixel 15" MacBook Pro. All the screen elements would be the same physical size as elements on the 1440x900 display, but with a much higher level of detail. Developers would simply need to provide 2x-resolution images for their user interface elements, just like on the iPhone to support its high resolution Retina display.

This new system seems far easier to support than the previous system which tried to support an arbitrary number of resolutions with elements described in vectors or multiple bitmaps. So, it's easy to see how this could pave the way for Apple to start releasing monitors and notebooks with double-resolution displays. There has already been talk about iPad-sized Retina displays which would have 2048x1536 resolution on a 9.7" screen. It's not hard to imagine that technology will advance enough in the next couple of years to allow for similarly dense laptop or even desktop displays. HiDPI modes are not enabled by default and must be enabled in Lion's Quartz Debug.

Top Stories

Apple-Acquired Dark Sky Officially Shuts Down Android App

Saturday August 1, 2020 3:43 pm PDT by
Apple in March purchased weather app Dark Sky, and at that time, Dark Sky's developers said that the app's Android version would be discontinued on July 1, 2020. However, instead of shuttering the app on that date, the app's developers announced that the discontinuation would be delayed for another month. Now that it's August, Android users are no longer able to access the app, and...

Apple May Launch This Year's 'iPhone 12' Lineup in Two Stages, With 6.1-inch Models Debuting First

Monday August 3, 2020 3:14 am PDT by
Apple last week confirmed that its "‌iPhone‌ 12" launch will be delayed this year due to the ongoing global health crisis and restrictions on travel. Apple last year started selling iPhones in late September, but this year, Apple projects supply will be "available a few weeks later," suggesting a release sometime in October. We're expecting a total of four OLED iPhones in 5.4, 6.1, and...

Apple Announces New 27-Inch iMac With 10th-Gen Processors, Up to 128GB RAM, 1080p Webcam, True Tone, and More

Tuesday August 4, 2020 8:07 am PDT by
Apple today announced a new 27-inch iMac with faster 10th-generation Intel Core processor options, next-generation AMD graphics, up to 128GB of RAM, a higher-resolution 1080p front-facing FaceTime camera, a True Tone display with a nano-texture glass option, a T2 chip, higher fidelity speakers, studio-quality microphones, and more. A breakdown of the new 27-inch iMac's features and specs:10th...

Apple Explains Why You Might See 'Not Charging' When a Mac is Plugged In

Monday August 3, 2020 1:42 pm PDT by
If you have a Mac and have seen a "Not Charging" warning when plugging it in to power, Apple last week released a support document that explains why. Macs running macOS 10.15.5 or later have a Battery Health Management feature to preserve the life of the battery, and occasionally, the Battery Health Management option will cause the Mac to pause its charging for calibration purposes.Depending ...

Top Stories: Try the 5.4-Inch iPhone 12 Display Size, Blockbuster Earnings, Tim Cook at Antitrust Hearing

Saturday August 1, 2020 6:00 am PDT by
Another busy week of Apple news and rumors has wrapped up, with a lot of focus on Tim Cook's appearance at a Congressional antitrust hearing and a blockbuster earnings report. Subscribe to the MacRumors YouTube channel for more videos. We continued to hear rumors about the upcoming iPhone 12 lineup, including a rare admission from Apple that the lineup will launch "a few weeks later" than...

Unreleased iPod Touch with Mac Pro Glossy Black Finish Shared Online

Sunday August 2, 2020 11:32 am PDT by
Twitter user @DongleBookPro has today posted images of what seems to be a first-generation iPod Touch prototype with a 2013 Mac Pro-style glossy black finish. The Twitter user claims that the iPod Touch prototype pictured has "the same coating as the 2013 Mac Pro." Had the finish been selected for the final product, it also would have been similar to the metallic glossy black finish that...

Just How Small Will the 5.4-Inch iPhone 12 Screen Be? Try It Out for Yourself

Tuesday July 28, 2020 12:57 pm PDT by
As rumors of the iPhone 12 have continued to build over the past few months, the one model that has the most excitement around it is the smallest 5.4" model. The iPhone 12 is believed to be coming in 5.4", 6.7", and 6.1" sizes. Dummy models have shown how much smaller the 5.4" is compared to the rest of the iPhone lineup. The upcoming 5.4" iPhone falls in-between the size of the original...

Everything New in iOS 14 Beta 4: Apple TV Widget, Search Improvements, Exposure Notification API and More

Tuesday August 4, 2020 11:14 am PDT by
Apple today released the fourth developer betas of iOS and iPadOS 14 for testing purposes, tweaking and refining some of the features and design changes included in the update. Changes get smaller and less notable as the beta testing period goes on, but there are still some noteworthy new features in the fourth beta, which we've highlighted below. - Apple TV widget - There's a new Apple TV...

Microsoft to Stop Supporting Office 2016 for Mac in October

Monday August 3, 2020 12:21 pm PDT by
Microsoft's Office 2016 for Mac is set to reach its end of support date on October 13, 2020, and after that date, connecting to Office 365 services using the Office 2016 for Mac software will no longer be supported. Microsoft shared the detail in a support document from July highlighting which versions of Office will be supported for connecting to Office 365 services in the future.Connecting ...

Apple Shares Requirements for Default Third-Party Browser and Email Apps With Developers

Monday August 3, 2020 4:28 pm PDT by
Apple in iOS 14 plans to allow users to set a third-party app as the default email or browser app on an iPhone or iPad, replacing the current Apple-made default apps Safari and Mail. Apple hasn't provided many details on the new feature to users, but as noted by MacStories' Federico Vittici, Apple has shared documentation with developers who want their apps to have the option to be set as a...