The Calendar app in macOS 15 Sequoia: Reminders and design customization

Not only the major changes and innovations, presented during the WWDC24 keynote, will be available on the Apple Mac in autumn with macOS Sequoia. A few minor adjustments can also be made while trying out the beta version discover. In this article, I will discuss the changes in the Calendar app. The Mac calendar has not only been expanded to include reminders - as shown during the presentation. When I looked at the app, I noticed several additional adjustments.

With macOS Sequoia, not only are reminders integrated into the Apple Mac's calendar app. I also found some design adjustments.
With macOS Sequoia, not only are reminders integrated into the Apple Mac's calendar app. I also found some design adjustments.

Create, access and check reminders in the calendar app

Not only are the to-do items created in the Reminders app transferred to the Calendar app starting with macOS 15. You can also create new reminders in the calendar itself. These then appear in the Reminders app and in its desktop widget if you use it. Since I personally don't create to-do lists using the Reminders app, I can't say anything more about it. I don't know enough about the tool for that.

Reminders in the Calendar app on macOS 15 Sequoia (beta version).
Reminders in the Calendar app on macOS 15 Sequoia (beta version).

Design changes in the Calendar app starting with macOS Sequoia

When comparing the calendar app of macOS 14 Sonoma and macOS 15 Sequoia, I noticed several design changes in the monthly overview: a color adjustment of the entire interface, a calendar symbol in front of all-day entries, a vertical line instead of a dot in front of appointments and a star in front of holidays, which are also highlighted in a different color. The color can certainly be customized, though (I haven't tested it yet).

The month view in the Mac calendar – Sonoma on the left and Sequoia on the right.
The month view in the Mac calendar – Sonoma on the left and Sequoia on the right.

There are also a few design adjustments in the week overview of the Mac calendar. In addition to the star symbol on the holiday notice, it is noticeable, for example, that not only the start time but also the end time is now displayed for entered appointments. Instead of "9:00", my test event now says "9:00 - 10:00" (see screenshot). This is also preceded by a small clock symbol. Furthermore, the time is now below the title of the entry instead of above it. For recurring appointments, a repeat symbol (two arrows circling each other) is visible in the top right corner.

The week view of the Mac Calendar app – Sonoma on the left, Sequoia on the right.
The week view of the Mac Calendar app – Sonoma on the left, Sequoia on the right.

Another change to the week view affects the current week, specifically the time marker. This time marker, which runs from top to bottom throughout the day, shows the current time with a red background starting with macOS Sequoia. Up to Sonoma, the text itself is shown in red and not with a color background, which is a bit harder to read. In addition to the red dot, which is shown to the left of the current day, the continuous horizontal line is also formatted in bold in the current day. There are now three markers for the day: the red circle with the day number above the day column, the dot on the timeline, and its bold formatting.

The current week in the Calendar app: the time and current day are easier to see starting with macOS 15 Sequoia (right).
The current week in the Calendar app: the time and current day are easier to see starting with macOS 15 Sequoia (right).

My conclusion on the calendar adjustments in macOS Sequoia

I find the new design elements of the calendar app in macOS 15 Sequoia take some getting used to - but only to the extent that such adjustments always do. After a few days you get used to it. And after a few weeks you forget that the calendar used to look different. I also find the changes to be quite positive. I didn't need a third indication of the current day, but the symbols in front of the appointment entries and the display of the time period instead of just the start time are practical. 

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