Three days ahead of its Mac event, Apple has released macOS Sierra 10.12.1, which weighs in at a modest 584 MB.

It promises to:

• add an automatic smart album in Photos for Depth Effect images taken on iPhone 7 Plus
• fix compatibility issues in Microsoft Office when using iCloud Desktop and Documents
• fix an issue that may prevent Mail from updating when using a Microsoft Exchange account
• fix an issue that caused text to paste incorrectly sometimes when using Universal Clipboard
• improve reliability of Auto Unlock with the Apple Watch
• improve stability and security of Safari
• fix an issue that may cause Mail to display unnecessary password prompts for AOL accounts
• fix incompatibilities with Fujitsu ScanSnap software
• fix a Filter Failed error when printing to some Canon printers
• fix an issue that may prevent Grapher files from opening
• restore the Safari option to ‘never use font sizes smaller than’ for displaying fonts on webpages
• improve the reliability of System Image Utility and imagetool when creating network disk images.

Security fixes include:

• improved lock state checking in AppleGraphicsControl
• a couple of memory corruption issues in ATS
• better handling of JPEG images in CoreGraphics, and of PDFs and SGI images
• FaceTime’s interface for relayed calls
• parsing of disk images in NTFS
• memory corruption in NVIDIA graphics drivers
• system boot.

Matching security updates are also available for El Capitan and Yosemite. iOS 10.1, watchOS 3.1, tvOS 10.0.1, and Safari 10.0.1 have also been released concurrently.