macOS 10.13 High Sierra SDK Release Notes
macOS 10.13 SDK provides support for developing macOS apps. It’s packaged with a complete set of Xcode tools, compilers, and frameworks for creating apps for iOS, watchOS, tvOS, and macOS. These tools include the Xcode IDE and the Instruments analysis tool, among many others.
With this software you can develop apps for MacBook, MacBook Air, MacBook Pro, iMac, iMac Pro, Mac Pro, and Mac Mini running macOS High Sierra 10.13.
Tools and Developer Resources
You obtain Xcode 9 from the Mac App Store. It is a free download that installs directly into the Applications folder. By default, Xcode downloads developer documentation in the background for offline reading; it also automatically downloads documentation updates. This behavior can be changed after installation using the Downloads preferences pane.
The Apple Developer Program provides access to the App Store, Mac App Store, and Apple TV App Store, additional support and documentation, and signing resources for testing and deployment on Apple TV, Apple Watch, iPad, iPhone, and iPod touch devices. For more information, visit the Apple Developer Program website.
Apple provides the following web resources to support development in macOS:
Apple Developer Forums. Participate in discussions about developing for Apple platforms and using developer tools.
Bug Reporter. Report issues, enhancement requests, and feedback to Apple. Provide detailed information, including the system and developer tools version information, and any relevant crash logs or console messages.
Apple Developer website. Get the latest development in formation as well as technical documentation for Xcode.
macOS homepage. Get high-level information about the latest release of Xcode. Download current and beta Xcode releases.
For issues not mentioned in Notes and Known Issues, please file bugs through the Apple Developer website https://developer.apple.com/bug-reporting/.
When filing a bug, please include the full version number in the bug title and in the description. To find the version number, choose About this Mac from the Apple Menu, then click on the version number in the window that appears to show the full version number including the part in parenthesis. The full version number looks like 10.13 (17Axxx).
Additionally, you may discuss these issues and macOS 10.13 SDK in the Apple Developer Forums: https://forums.developer.apple.com/welcome. To get more information about iCloud for Developers, go to https://developer.apple.com/icloud.
Release Notes Updates
macOS Release Notes is sometimes updated after a release is distributed. You can check for the most up-to-date version of macOS Release Notes at the Apple Developer website by checking http://developer.apple.com/go/?id=macos-sdk-release-notes.
Revision: macOS1013 - MRN1
macOS 10.13 SDK supports the following Macs:
MacBook or iMac: Late 2009 or newer
MacBook Air, MacBook Pro, Mac mini, or Mac Pro: 2010 or newer
MacBook (Late 2008 Aluminum, or Early 2009 or newer)
Mac mini (Early 2009 or newer)
MacBook Pro (Mid/Late 2007 or newer)
Mac Pro (Early 2008 or newer)
Xserve (Early 2009)
Notes and Known Issues
The following items relate to using macOS SDK to develop code.
Apple File System (APFS)
HDD and Fusion drives can't be converted to APFS. (32360337, 31851687)
Some third-party applications may not correctly recognize volumes that are formatted using APFS.
CloudKit doesn't support
unsigned long longvalues with the high-order bit set. (30567424)
Applications that use
CKModifyRecordsOperationshould specify an appropriate value for
CKModifyRecordsOperation.isAtomic. If your client is compiled against macOS 10.13, operations enqueued against the default
CKRecordZonehave new behavior because
trueby default. If the operation hits a "preflight" failure (most commonly, a network issue uploading a
CKAsset, or a malformed
CKRecord), the entire operation is canceled. (30838858)
startSecureConnectionto establish a secure connection.
HEVC and HEIF Images
macOS 10.13 adds HEVC and HEIF decode capability. In order to display HEIF image files or HEVC videos captured on iOS 11, your Mac needs to be updated to macOS 10.13.
The specific hardware and software requirements for HEVC and HEIF are detailed in the WWDC 2017 presentations covering these new technologies. Depending on the capabilities of your Mac and the needs of your content, AVFoundation may use a software-based HEVC encoder which typically has longer encoding times.
Kernel Extension Loading
Some third-party apps may not fully handle instances where their kernel extension is denied user consent to load.
Kernel extensions blocked in early boot do not display an alert.
Some text may not be localized to the selected system language.
Some languages may have clipped or misaligned layout.
An issue preventing the appearance of volume and brightness sliders on tap and immediate drag on the Control Strip buttons has been fixed. (29465989)
VNFaceLandmarkRegion2Dis currently unavailable in Swift. (33191123)
Facial landmarks identified by the Vision framework may flicker in temporal use cases such as video. (32406440)