macOS 11.3 Could Ensure Your Mac is Fully Charged in Time for Calendar Events

Apple appears to be planning a meeting-friendly improvement to its Optimized Battery Charging feature on the Mac in macOS 11.3.

macos big sur calendar
New code in the second beta of macOS 11.3, discovered by MacRumors contributor Steve Moser, suggests that the upcoming software update will ensure a Mac is fully charged to 100% prior to a scheduled calendar event, such as a meeting.

macOS 11.3 will ensure that a Mac finishes charging to 100% three hours prior to a calendar event's start time, the code suggests, although the exact timing may vary depending on whether an alert is set for the calendar event.

Macs running macOS 10.15.5 or later have an Optimized Battery Charging feature that helps to reduce wear on the battery and improve its lifespan by learning the user's daily charging routine. The feature delays charging the battery past 80% when it predicts the user will be connected to power for an extended period of time, and aims to charge the battery before they unplug from power, according to Apple.

Optimized Battery Charging can be toggled on or off in System Preferences > Battery > Battery on both Intel-based and M1-based Macs, but there are certain other battery health management features that cannot be disabled on M1-based Macs.

Related Forum: macOS Big Sur

Popular Stories

apple store down feature

Here's Why the Apple Store is Going Down

Thursday November 27, 2025 1:01 pm PST by
Apple's online store is going down for a few hours on a rolling country-by-country basis right now, but do not get your hopes up for new products. Apple takes its online store down for a few hours ahead of Black Friday every year to tease/prepare for its annual gift card offer with the purchase of select products. The store already went down and came back online in Australia and New Zealand, ...
iPhone Pocket Short

iPhone Pocket is Now Completely Sold Out Worldwide

Tuesday November 25, 2025 7:16 am PST by
Apple recently teamed up with Japanese fashion brand ISSEY MIYAKE to create the iPhone Pocket, a limited-edition knitted accessory designed to carry an iPhone. However, it is now completely sold out in all countries where it was released. iPhone Pocket became available to order on Apple's online store starting Friday, November 14, in the United States, France, China, Italy, Japan, Singapore, ...
New Intel Logo

Apple and Intel Rumored to Partner on Mac Chips Again in a New Way

Friday November 28, 2025 7:33 am PST by
While all Macs are now powered by Apple's custom-designed chips, a new rumor claims that Apple may rekindle its partnership with Intel, albeit in a new and limited way. Apple supply chain analyst Ming-Chi Kuo today said Intel is expected to begin shipping Apple's lowest-end M-series chip as early as mid-2027. Kuo said Apple plans to utilize Intel's 18A process, which is the "earliest...
streaming black friday 2025

Best Black Friday Streaming Deals - Save Big on Apple TV, Disney+, Hulu, and More

Thursday November 27, 2025 1:14 pm PST by
We've been focusing on deals on physical products over the past few weeks, but Black Friday is also a great time of year to purchase a streaming membership. Some of the biggest services have great discounts for new and select returning members this week, including Apple TV, Disney+, Hulu, Paramount+, Peacock, and more. Note: MacRumors is an affiliate partner with some of these vendors. When...
iphone air camera

iPhone Air Flop Sparks Industry Retreat From Ultra-Thin Phones

Thursday November 27, 2025 3:14 am PST by
Apple's disappointing iPhone Air sales are causing major Chinese mobile vendors to scrap or freeze their own ultra-thin phone projects, according to reports coming out of Asia. Since the ‌iPhone Air‌ launched in September, there have been reports of poor sales and manufacturing cuts, while Apple's supply chain has scaled back shipments and production. Apple supplier Foxconn has...
iphone black friday gold

The Best Black Friday iPhone Deals Still Available

Friday November 28, 2025 6:24 am PST by
Cellular carriers have always offered big savings on the newest iPhone models during the holidays, and Black Friday 2025 sales have kicked off at AT&T, Verizon, T-Mobile, and more. Right now we're tracking notable offers on the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air. For even more savings, keep an eye on older models during the holiday shopping season. Note: MacRumors is...
Apple Foldable Thumb

Foldable iPhone to Debut These Three Breakthrough Features

Tuesday November 25, 2025 7:09 am PST by
Apple's first foldable iPhone is expected to launch alongside the iPhone 18 Pro models in fall 2026, and it's shaping up to include three standout features that could set it apart from the competition. The book-style foldable will reportedly feature an industry-first 24-megapixel under-display camera built into the inner display, according to a recent JP Morgan equity research report. That...

Top Rated Comments

NT1440 Avatar
62 months ago

How about it just charges as much and as fast as possible when I plug it in?
Because that decreases the overall lifespan of the battery. This is a feature for macs that are plugged in most of the time. It prevents it from being charged fully all the time which is also bad for lithium based batteries.

If you use it unplugged frequently it will do exactly what you’re expecting, but this article is discussing a subset feature of Battery Optimization which is different from your use case.
Score: 19 Votes (Like | Disagree)
Neberheim Avatar
62 months ago
I’ve been waiting for this. I hope that iOS will get a similar feature using the sleep/wake alarm.



How about it just charges as much and as fast as possible when I plug it in?
Like it does when you turn optimizing charging off?
Score: 10 Votes (Like | Disagree)
itsmeaustend Avatar
62 months ago

Sigh...only on MacRumors....
What, a logical response?
Score: 9 Votes (Like | Disagree)
Crzyrio Avatar
62 months ago

I’ve never needed this and never will. I’m good at charging my mac. Apple believes they still own the device and can do whatever they like with the software and hardware even after you bought it.
The 99% of other people, will benefit from things like this.
Score: 7 Votes (Like | Disagree)
BeefCake 15 Avatar
62 months ago

I’ve never needed this and never will. I’m good at charging my mac. Apple believes they still own the device and can do whatever they like with the software and hardware even after you bought it.
Whatchu talking about Willis?!
Score: 6 Votes (Like | Disagree)
BF1M Avatar
62 months ago

I’ve mentioned before, I wish i could manually control when my iPhone, iPad, MacBook Pro charges.
Wait let me try this....Ahem " Der you mean like when you connect it to a charger? Hardy Har Har..."
Score: 6 Votes (Like | Disagree)