GNU is an operating system that is free software—that is, it respects users' freedom. The GNU operating system consists of GNU packages (programs specifically released by the GNU Project) as well as free software released by third parties. The development of GNU made it possible to use a computer without software that would trample your freedom. MacOS Big Sur elevates the most advanced desktop operating system in the world to a new level of power and beauty. Experience Mac to the fullest with a refined new design. Enjoy the biggest Safari update ever. Discover new features for Maps and Messages. And get even more transparency around your privacy. What is the latest Mac OS 2019? MacOS Catalina (version 10.15) is the sixteenth and current major release of macOS, Apple’s desktop operating system for Macintosh computers. It is the successor to macOS Mojave, and was announced at WWDC 2019 on June 3, 2019 and released to the public on October 7, 2019.
People accuse electronics manufacturers of built-in obsolescence: that hardware is designed to stop working or not be useful after a relatively short period of time. Apple has generally avoided that with Macs, letting many of its models receive OS X and macOS updates for five to seven years after the computer version’s initial release. And some people keep older systems running indefinitely, as I noted in a recent column that started with people’s love of 10.6.8 Snow Leopard, now over a decade old.
But Apple doesn’t provide a guide as such as to the “terminal” version of its operating system you can install on any given computer. That is, how do you find the last version your computer is compatible with?
You can track it down, but you have to work in reverse. Apple has a page for each release that in older versions of the OS describes the features required in Macs to handle it, and in newer versions lists the oldest models supported or spell out every model. There may be additional requirements, such as minimum RAM installed, and one always needs a certain amount of free disk space, often specified..
For example, for Mac OS X 10.7 Lion, released in mid-2011, Apple notes that an “Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor” is required, but not which models; 2GB of RAM is also needed. Fortunately, third-party sites can provide the reverse lookup that helps narrow this down. EveryMac.com, which dates back nearly 25 years, has pages that list every Mac model by processor. Click on Core 2 Duo, and you can find that the late 2006 17-inch iMac is among the earliest that can be upgraded to Lion.
Finding some of these Mac updates is tricky, but our colleagues at Macworld UK have a rundown of how to find downloads for OS X and macOS releases over the last decade. If you can only find an installer that upgrades from an existing OS X or macOS release, you may have to install a later version, often 10.6.8, before using the upgrader.
Here are the links to find system requirements for Lion and later:
This Mac 911 article is in response to a question submitted by Macworld reader Amma.
Ask Mac 911
We’ve compiled a list of the questions we get asked most frequently along with answers and links to columns: read our super FAQ to see if your question is covered. If not, we’re always looking for new problems to solve! Email yours to mac911@macworld.com including screen captures as appropriate, and whether you want your full name used. Not every question will be answered, we don’t reply to email, and we cannot provide direct troubleshooting advice.
Updates to Fitbit OS provide new features, improvements, and bug fixes for your Fitbit watch.
Fitbit OS 5.2 (Sense and Versa 3 only)- To open the Clocks app on your smartwatch, press and hold your finger on your current clock face. For more information, see How do I change the clock face on my Fitbit device?
- See your SpO2 data on your wrist in the Today app . For more information, see How do I track blood oxygen saturation (SpO2) with my Fitbit device?
- When you interact with Google Assistant on your watch, your voice assistant responds through the watch’s speaker. For more information, see How do I use a voice assistant on my Fitbit smartwatch?
- Versa 3 notifies you when your heart rate goes above or below your personal heart-rate threshold. For more information, see How do I track heart rate with my Fitbit device?
- This release includes bug fixes and improvements.
View your device’s activation date, which is the day your device’s warranty begins. The activation date is the day you set up your device.
This release includes bug fixes and improvements.
What's new
- View your device’s activation date, which is the day your device’s warranty begins. The activation date is the day you set up your device.
- Use Google Assistant on Fitbit Sense and Fitbit Versa 3. For more information, see How do I use a voice assistant on my Fitbit smartwatch?
- Use the built-in speaker and microphone in Sense and Versa 3 to take calls from your wrist. For more information, see How do I take on-wrist phone calls with my Fitbit smartwatch?
What's fixed
This release includes bug fixes and improvements.
Fitbit OS 4.2What's new
- When you can’t find your phone, use the Find Phone app to locate it. For more information, see How do I set up and troubleshoot apps on my Fitbit device?
- You can now earn Active Zone Minutes and use personalized heart-rate zones when you track activity with your smartwatch. For more information, see What are Active Zone Minutes or active minutes on my Fitbit device? and How do I track heart rate with my Fitbit device?
- Receive reminders on your watch that encourage you to form and maintain healthy habits. For more information, see What are the reminders I see on my Fitbit device?
What's changed
- An additional 6 languages are now available on your watch: Brazilian Portuguese, Czech, Indonesian, Polish, Romanian, and Russian.
- To access the control center on your watch, swipe down from the top of your screen. After your notifications appear, swipe down again to open the control center. For more information, see How do I navigate my Fitbit device?
What's fixed
This release includes bug fixes and improvements.
Fitbit OS 4.1.2 (Ionic, Versa, and Versa Lite Edition only)- (Versa Lite Edition only) This release fixes an issue where some customers may have been unable to update Versa Lite Edition after completing a factory reset. If you factory reset your device and your watch is on version 38.6.1.1, see Why can't I update my Fitbit device?
- This release includes bug fixes and improvements.
- We optimized the algorithm used to track your heart rate on Versa 2 to complement our latest hardware.
- This release includes bug fixes and improvements.
What's new?
- See your sleep score on your wrist in Fitbit Today. For more information, see What's sleep score in the Fitbit app?
- Avoid being awoken while in deep sleep. Set an alarm with our new Smart Wake feature to wake up feeling refreshed. For more information, see What should I know about Fitbit sleep stages?
- Save up to 5 of your favorite clock faces and switch between them on your Fitbit device. For more information, see How do I change the clock face on my Fitbit device?
- See upcoming calendar events with the Agenda app . For more information, see How do I set up and troubleshoot apps on my Fitbit device?
- Access additional options when you press the shortcut button on the left side of your Fitbit device. For more information, see How do I navigate my Fitbit device?
What's changed?
Exercise app
- We updated the design of the Exercise app .
- We changed the way you start an exercise.
- You can now track 20 exercises from your Wrist.
For more information, see How do I track my workouts with my Fitbit device?
Always-on Display (Versa 2 only)
- Certain clock faces now come with Always-on Display modes.
- Turn your wrist to wake the screen and show your primary clock face.
For more information, see How do I see the time on my Fitbit device?
Alexa (Versa 2 only)
- On Fitbit Versa 2, you can now use the Fitbit skill to ask Alexa to open the Exercise app and start a workout for you. These commands are currently available in English and German.
- You now access Alexa through the Alexa app on Versa 2.
For more information, see How do I use a voice assistant on my Fitbit smartwatch?
What's fixed?
This release includes other bug fixes and improvements.
Fitbit OS 4.0.1To update Versa Lite Edition, let the Fitbit app run in the background on your phone. When the update is ready, you’ll see a notification in the Fitbit app. For more information, see How do I update my Fitbit device?
For Ionic and Versa, we recommend updating your watch over Wi-Fi. For more information, see How do I update my Fitbit device?
What's fixed
This release includes bug fixes and improvements.
Fitbit OS 3.0What's new
You can now set exercise goals for time, distance, or calories in the Exercise app on your Fitbit device. For more information, see How do I track my workouts with my Fitbit device?
Fitbit Today
We updated the stats available in Fitbit Today and you can now log information right on your wrist. With Fitbit Today updates you can:
- Customize the stats you see. For more information, see About Fitbit Ionic and How do I get started with Fitbit Versa?
- See additional stats including sleep, weight, water intake, and badges.
- Log your water intake and weight right from your wrist.
What’s changed
- You can now keep your clock screen turned on for up to 60 seconds.
- The stopwatch now stays open on your screen while in use.
- Notifications now automatically wake your device.
- Customers in Taiwan can now add iPASS or co-branded credit cards to their watch. For more information, see How do I use iPASS with my Fitbit device?
What’s fixed
This release includes other bug fixes and improvements.
Fitbit OS 2.2What’s New
- When you’re downloading multiple playlists, you can now see the download progress of each playlist.
- Your Fitbit watch automatically connects to your most recently paired, available headphones when you play music. For more information, see How do I connect Bluetooth audio devices to my Fitbit watch?
- Your alarms and timers now alert you even when your Fitbit device is locked.
What’s fixed
This release includes other bug fixes and improvements.
Fitbit OS 2.1What’s New
Introducing quick replies. Send customized responses to text messages and messages from select messaging apps with your Fitbit watch. Note that this feature is currently only available on watches paired to an Android phone. For more information, see How do I respond to messages with my Fitbit device?
What’s fixed
This release includes other bug fixes and improvements.
Fitbit OS 2.0What’s New
Fitbit Today
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Introducing Fitbit Today, an updated on-device dashboard that keeps you informed about all of your health and fitness data. Receive action-oriented and personalized content with daily and weekly health and fitness stats, historical activity, exercise summaries, and tips and tricks for using the Fitbit platform. Swipe up from the clock face to open the Fitbit Today dashboard.
Ionic users, your daily stats have moved from the Today app to Fitbit Today.
Music
You can now add Deezer playlists to your Fitbit watch. For more information, see How do I listen to Deezer playlists on my Fitbit watch?
What’s Changed
Fitbit Watch Interface
We made some updates to the way you interact with your Fitbit watch:
- To see your notifications, swipe down from the clock face or press and hold the top button.
- To see your stats and current battery level, swipe up from the clock face.
- To access music controls, payments, and the quick settings screen, press and hold the back button.
- Access your music controls all on one screen.
- We’ve changed the order of some of the apps on your watch.
To learn more about these changes, open the Tips app on your watch and follow the tutorial.
Fitbit Coach
- You can now get more Fitbit Coach workouts right on your wrist with your Fitbit Coach account.
- Connect your watch to Wi-Fi to download the Fitbit Coach updates. For more information, see How do I connect my Fitbit watch to Wi-Fi?
Feature Update
We improved the way we track your distance when you’re tracking a run with GPS.
What's Fixed
- We fixed an issue where some customers’ clocks didn’t update after switching time zones.
- We fixed an issue where some customers experienced syncing issues after interrupting clock face installation.
- We fixed an issue where some customers noticed the Exercise app crashed after double tapping an exercise.
- This release also includes bug fixes and stability improvements.
New Features
This release delivers a more personalized experience for Fitbit Ionic customers. Read on for details.
New apps and clock faces
This Fitbit OS update provides access to new apps and clock faces from Fitbit, Fitbit Labs, popular brands, and developers. The apps span a range of categories such as Flipboard, The New York Times, and Yelp. New apps and clock faces will be added frequently. Browse the available apps in the Fitbit App Gallery.
For more information, see How do I install and manage apps on my Fitbit device?
Fitbit Labs
We’re introducing Fitbit Labs, which develops experimental apps and clock faces for Ionic. Install an app or clock face to motivate you to stay active, help track and interpret your behavior, and provide intelligent feedback. Choose to adopt a virtual pet and use your steps to keep them fed and happy with one of the FitPet interactive clock faces, or install the Think Fast app and test your ability to rapidly and accurately switch between tasks. Check back often for new apps.
Fitbit Pay
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Now you can add up to 6 credit and debit cards to Fitbit Pay on Ionic and choose which card you want to use for each transaction. When you’re ready to pay, swipe right on your watch’s screen to scroll through your cards.
Note this feature is coming soon to the Fitbit app for Windows 10.
For more information, see What should I know about Fitbit Pay?
Fixes and Improvements
This release includes other bug fixes and improvements.
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