MacOs X

the Apple Macintosh Operating System built on top of FreeBSD.

MacOS is a more general label including this version plus earlier versions

list of versions (names vs numbers)

• 10.0 Cheetah 2001...
• 10.6 Snow Leopard 2009
• 10.7 Lion
• 10.8 Mountain Lion
• 10.9 Mavericks
• 10.10 Yosemite
• 10.11 ElCapitan (Sept'2020 running on the iMac)
• 10.12 Sierra (Sept'2020 running on my MacBookPro
• 10.13 High Sierra
• 10.14 Mojave
• 10.15 Catalina (Oct'2020 running on my new MacBookPro; Mar'2021 upgraded to this on the ancient iMac) - will probably hit end-of-life fall'2022
• 11.0 Big Sur
• 12.0 Monterey - Apr'2022 is at 12.3.1
• 13.0 Ventura - Oct24'2022
• 14.0 Sonoma - Sept'2023
• 15.0 Sequoia

Apr'2011 - the add-ons used by Thirty7 Signals folks.

• someone's Dec'2011 list
  • and discussion
• Some add-ons I should look at
  • Re Mind http://www.43folders.com/2005/02/guest_mike_harr.html
  • Launch Bar http://www.obdev.at/products/launchbar/
  • Quick Silver http://quicksilver.blacktree.com/
  • Growl Notification API http://www.growl.info/

Dec'2007 list of free apps you can carry around on a Flash Drive. (Of course that assumes that you'd find a Mac to rent time on...)