Apple has a KnowledgeBase article for macOS Sierra 10.12.1 that includes more detailed patch notes than the ones listed in the Mac App Store (see below).
The update is a 584MB download—your mileage will vary depending on your Mac.
macOS Sierra Update 10.12.1
The macOS Sierra 10.12.1 update improves the stability, compatibility, and security of your Mac, and is recommended for all users.
This update:
- Adds an automatic smart album in Photos for Depth Effect images taken on iPhone 7 Plus.
- Improves the compatibility of Microsoft Office when using iCloud Desktop and Documents.
- Fixes an issue that may prevent Mail from updating when using a Microsoft Exchange account.
- Fixes an issue that caused text to sometimes paste incorrectly when using Universal Clipboard.
- Improves reliability of Auto Unlock with Apple Watch.
- Improves security and stability in Safari.
- Fixes an issue that may cause Mail to display unnecessary password prompts for AOL accounts.
- Improves compatibility with Fujitsu’s ScanSnap scanning software.
- Addresses a “Filter Failed” error when printing to some Canon printers.
- Fixes an issue that may prevent Grapher files from opening.
- Brings back the Safari option to “never use font sizes smaller than” for displaying fonts on webpages.
Enterprise content:
- Improves reliability of System Image Utility and imagetool when creating network disk images.
Apple’s claim in bullet point 3 that they have fixed an issue with Mail and Exchange servers is wrong. After upgrading to 10.12.1 yesterday afternoon things worked properly the rest of the day for me, but this morning it’s back to the same behavior … I can only get Mail sent to my Exchange account if I quit Mail and relaunch it or if I take all accounts offline and back online.
Going back to El Crapitan there has been exactly one release where Mail worked properly … 10.11.6.
10.11.0-3 had a horrendous memory leak. 10.11.4-5 fixed that but introduced a read and deleted messages come back as unread bug. 10.12.0-1 can’t fetch mail from an Exchange server properly … good thing there’s only a few of those out there.
But hey, I have plenty of stickers and emoji to choose from … and there’s one in particular that I’m thinking of sending to Apple…
Update, took watch off, put it back on and entered passcode and now unlock seems to work.
It was working for me but after updating phone, watch and Mac, it no longer works. Rebooted each device multiple times and still doesn’t work. Turned off and back on in System Preferences on Mac and still doesn’t work. Sigh.