"About iMac SMC Firmware Update 1.1 (921KB)
This update is recommended for iMac (late 2013) with flash-only storage. This update improves the Power Nap feature in Mavericks on your flash based iMac by allowing it to perform silently, without spinning up the fan.

Power Nap periodically updates apps, such as Mail, Contacts, and Calendar, and will download software updates while your iMac is sleeping."

Feature	Summary
Stability and performance	Includes general performance and stability improvements.

I don't own a 2nd/3rd gen Apple TV but hear this also fixed a problem with Movie rentals missing after Apple TV 6.0 update.
  

• Nvidia CUDA v5.5.28 for Mac OS X
• Mavericks corrupts (WD) external hard drive(s) (apple forum thread)
• OS X 10.9 Mavericks review (cnet)
• 2013 15" Retina MacBook Pro Review (cnet)
• (2013) Retina MacBook Pro (GeekBench) Benchmarks
• (How to) Remove menu bar from 2nd monitor in Mavericks
  (System Prefs->Mission Control, uncheck "Displays have separate spaces" option.)
• Paragon NTFS for OS X v11 w/support for 10.9 & new features
• FY 13 4th Quarter Results Conference Call (Apple PR)
• Mac vs PC - the battle resumes (on Mobile)

BTW: There is (was) a thread from users upset over Cloud-only syncing, as they were not aware of that before upgrading. (FYI: As of 10AM Oct 24th thread link fails. Deleted?) Here's a clip on that change in Mavericks from the apple doc About SyncServices:

"OS X Mavericks v10.9 and later do not use SyncServices. Instead, Mavericks supports sharing your information using several network-based and cloud-based solutions. If you want to sync your information across multiple devices and computers, you should use one or more of these methods. These include iCloud, CardDAV servers, CalDAV servers, and servers that utilize the Exchange ActiveSync protocol. "

• Aperture 3.5: Set "Share XML with other applications" to "Never" for better performance and faster quit times
  
  
• OS X: About OS X Recovery
• OS X: How to erase and install
• OS X: How to change user account name or home directory name
• OS X: About the "Are you sure you want to open it?" alert (File Quarantine / Known Malware Detection)
  
  
• Logic Pro X: Troubleshooting basics
• Logic Pro X: Using and saving patches
• Logic Pro X: About working with projects from previous versions of Logic
  
  
• Using USB 3 devices on Mac computers FAQ
• MacBook Pro: How to determine which graphics processor is in use
• Learn about overscan and underscan
  
  
• AirPrint Basics (w/list of compatible printers)
• How to view or print proof of coverage for your AppleCare agreement
• Media formats supported by QuickTime Player
• iCloud: Frequently asked questions about iCloud Keychain
• Messages: Reporting unwanted messages sent from iMessage
• About Windows Migration Assistant
  
  
• About SyncServices
• OS X: Resetting Sync Services
  
  
• OS X Server: How to enable the adaptive firewall
• OS X Server (Mavericks): Lion clients cannot connect to Profile Manager
  
  
• iOS: 'Trust This Computer' alert
• iOS: Turning off and on (restarting) and resetting
  
  
• Identifying iPhone models
• iPhone: Understanding U.S. government alerts
  
  
• Apple TV: How to install a configuration profile (added note on 6.0.1 update)
• Apple TV: Movie rentals are missing after you update to Apple TV software 6.0
  
  
• Redeeming an iTunes Digital Copy
• iTunes Store: Hiding and unhiding purchases

Wednesday's long list of updated docs moved to archives.
  

• AMD's Radeon R9 290X Review (anandtech)
• AMD's Radeon R9 290X vs Nvidia's high-end graphics cards
• $10 Smartphone to digital microscope conversion
• 3D Memory Gets a Boost (EETimes)
• Nissan recalls some 2013/2014 Pathfinder & Infiniti models (antilock brake software)
• Bank of America liable for Countrywide mortgage fraud
• Kings of Leon announce first leg of the 2014 Mechanical Bull Tour
• Review: Bruce Lee: The Legacy Collection (Blu-ray)
• M-Audio M3-8 (Powered) Speakers Review
• Review: The Heat (Blu-ray)

Wednesday Oct. 23rd, 2013 News Archive
• Logic Pro X 10.0.4 Update (changes/fixes)
• How to Install Mavericks on a SoftRAID volume (w/SoftRAID 4.5.3)
• Screen Sharing broken after update to ARD 4.7 w/o Mavericks upgrade
• Internal Pix of 2013 MacBook Pro 15" and 2013 MacBook Pro 13"
• Reviews of OS X Mavericks and iOS 7.0.3
• How to make a bootable OS X 10.9 USB install drive
• Apple's Guide to Creating a bootable OS X installer in OS X Mavericks
• Why Apple's New OS X Mavericks, iLife, iWork Pricing is a Big Deal
• OWC's Guide to Making the Most of new 2013 MacBook Pros
• New Mac Pro Gives Apple More Business Gravitas
• Apple Wins Patent-Infringement Trial Against Wi-Lan
• Review: NAD VISO 1 AP AirPlay Music System
• New/Updated Apple Support/How-To/Troubleshooting Articles:
  - How to use multiple displays with your Mac
  - Using 4K Ultra HDTVs with Mac computers
  - About integrated video on Intel-based Macs
  - Mac notebooks: Operating temperature
  - Mac computers: About standby mode
  - Troubleshooting wireless mouse and keyboard issues
  - Mac OS X versions (builds) for computers
  - Intel-based iMac: Installing available updates
  - EFI and SMC firmware updates for Intel-based Macs
  - OS X: How to migrate data from another Mac using Mavericks
  - OS X: How to migrate data from another Mac using Mountain Lion & earlier
  - OS X Mavericks: Migration may stall with "Sharing Only" user accounts
  - OS X Mavericks: Updating disc-installed Apple apps via Mac App Store
  - OS X Server: Upgrade and migration from Mountain Lion
  - OS X Server: Upgrade and migration from Lion Server or Snow Leopard Server
  - iWork for Mac: High Resolution support
  - iWork for Mac: Importing and exporting iWork '09 documents
  - About iBooks for Mac
  - (And Many More...)

For links to older news pages, see the Archives.