Here's When You Can Download iOS 15.4, iPadOS 15.4, and macOS Monterey 12.3 With Universal Control

As announced at Apple's "Peek Performance" media event on March 8, the public release of iOS 15.4, iPadOS 15.4, and macOS 12.3 is set to take place this week. Keep reading to learn when they are likely to become available to download in your time zone.

iOS 15
Many users have been eagerly awaiting iOS 15.4, which adds several new features, such as an option to use Face ID while wearing a mask (iPhone 12 and later), 37 new emoji characters, and support for the new "Tap to Pay on ‌iPhone‌" feature that allows NFC-compatible iPhones to accept payments through Apple Pay.

Meanwhile, iPadOS 15.4 and macOS 12.3 are set to make Universal Control available to the general public for the first time, allowing multiple Macs and iPads to be controlled with the same mouse/trackpad and keyboard. Also set to be made available to the general public for the first time are watchOS 8.5 and tvOS 15.4.

universal control wwdc
Apple has said the updates will arrive sometime between March 14 and March 18, and while we don't know the specific day when these updates will drop, Apple typically releases major new versions of its operating systems between Monday and Wednesday.

Regardless of the day they arrive, Apple's OS updates tend to come out around 10:00 a.m. Pacific Time. There are no guarantees Apple will stick to its usual release timing, but that seems to be a pretty reasonable guess, so we've put together this list of corresponding times around the world:

  • Honolulu, Hawaii — 7:00 a.m. HST
  • Anchorage, Alaska — 9:00 a.m. AKDT
  • Cupertino, California — 10:00 a.m. PDT
  • Phoenix, Arizona — 10:00 a.m. MST
  • Vancouver, Canada — 10:00 a.m. PDT
  • Denver, Colorado — 11:00 a.m. MDT
  • Dallas, Texas — 12:00 noon CDT
  • New York, New York — 1:00 p.m. EDT
  • Toronto, Canada — 1:00 p.m. EDT
  • Halifax, Canada — 2:00 p.m. ADT
  • Rio de Janeiro, Brazil — 2:00 p.m. BRT
  • London, United Kingdom — 5:00 p.m. GMT
  • Berlin, Germany — 6:00 p.m. CET
  • Paris, France — 6:00 p.m. CET
  • Cape Town, South Africa — 7:00 p.m. SAST
  • Helsinki, Finland — 7:00 p.m. EET
  • Istanbul, Turkey — 8:00 p.m. TRT
  • Dubai, United Arab Emirates — 9:00 p.m. GST
  • Delhi, India — 10:30 p.m. IST
  • Jakarta, Indonesia — 12:00 a.m. WIB next day
  • Shanghai, China — 1:00 a.m. CST next day
  • Singapore — 1:00 a.m. SGT next day
  • Perth, Australia — 1:00 a.m. AWST next day
  • Hong Kong — 1:00 a.m. HKT next day
  • Seoul, South Korea — 2:00 a.m. KST next day
  • Tokyo, Japan — 2:00 a.m. JST next day
  • Adelaide, Australia — 3:30 a.m. ACDT next day
  • Sydney, Australia — 4:00 a.m. AEDT next day
  • Auckland, New Zealand — 6:00 a.m. NZDT next day

For more on ‌macOS Monterey‌, make sure to check out our dedicated roundup and separate guide to Universal Control. For a complete overview of all of the features that are available in iOS 15, we also have a dedicated iOS 15 roundup.

Related Forums: iOS 15, macOS Monterey

Popular Stories

iphone 17 models

No iPhone 18 Launch This Year, Reports Suggest

Thursday January 1, 2026 8:43 am PST by
Apple is not expected to release a standard iPhone 18 model this year, according to a growing number of reports that suggest the company is planning a significant change to its long-standing annual iPhone launch cycle. Despite the immense success of the iPhone 17 in 2025, the iPhone 18 is not expected to arrive until the spring of 2027, leaving the iPhone 17 in the lineup as the latest...
duolingo ad live activity

Duolingo Used iPhone's Dynamic Island to Display Ads, Violating Apple Design Guidelines

Friday January 2, 2026 1:36 pm PST by
Language learning app Duolingo has apparently been using the iPhone's Live Activity feature to display ads on the Lock Screen and the Dynamic Island, which violates Apple's design guidelines. According to multiple reports on Reddit, the Duolingo app has been displaying an ad for a "Super offer," which is Duolingo's paid subscription option. Apple's guidelines for Live Activity state that...
Clicks Communicator Feature

'Clicks Communicator' Unveiled — Will You Carry This With Your iPhone?

Friday January 2, 2026 6:35 am PST by
The company behind the BlackBerry-like Clicks Keyboard accessory for the iPhone today unveiled a new Android 16 smartphone called the Clicks Communicator. The purpose-built device is designed to be used as a second phone alongside your iPhone, with the intended focus being communication over content consumption. It runs a custom Android launcher that offers a curated selection of messaging...
Low Cost MacBook Feature A18 Pro

Low-Price 12.9-Inch MacBook With A18 Pro Chip Reportedly Launching Early This Year

Friday January 2, 2026 9:08 am PST by
Apple plans to introduce a 12.9-inch MacBook in spring 2026, according to TrendForce. In a press release this week, the Taiwanese research firm said this MacBook will be aimed at the entry-level to mid-range market, with "competitive pricing." TrendForce did not share any further details about this MacBook, but the information that it shared lines up with several rumors about a more...
Apple Fitness Plus hero

Apple Announces New Fitness+ Workout Programs, Strava Challenge, and More

Friday January 2, 2026 6:43 am PST by
Apple today announced a number of updates to Apple Fitness+ and activity with the Apple Watch. The key announcements include: New Year limited-edition award: Users can win the award by closing all three Activity Rings for seven days in a row in January. "Quit Quitting" Strava challenge: Available in Strava throughout January, users who log 12 workouts anytime in the month will win an ...
Low Cost A18 Pro MacBook Feature Pink

Apple's 2026 Low-Cost A18 Pro MacBook: What We Know So Far

Friday January 2, 2026 4:33 pm PST by
Apple is planning to release a low-cost MacBook in 2026, which will apparently compete with more affordable Chromebooks and Windows PCs. Apple's most affordable Mac right now is the $999 MacBook Air, and the upcoming low-cost MacBook is expected to be cheaper. Here's what we know about the low-cost MacBook so far. Size Rumors suggest the low-cost MacBook will have a display that's around 13 ...
Mac Pro Feature Blue

What's Happening With the Mac Pro?

Wednesday December 31, 2025 9:59 am PST by
Apple hasn't updated the Mac Pro since 2023, and according to recent rumors, there's no update coming in the near future. In fact, Apple might be finished with the Mac Pro. Bloomberg recently said that the Mac Pro is "on the back burner" and has been "largely written off" by Apple. Apple apparently views the more compact Mac Studio as the ideal high-end pro-level desktop, and it has almost...

Top Rated Comments

roncron Avatar
50 months ago
Title should be "We don't know which day you can download iOS 15.4..."
Score: 23 Votes (Like | Disagree)
SvenLorenz1975 Avatar
50 months ago
Just make sure to post the "IT'S OUT NOW! START DOWNLOADING NOW!" article half an hour before it's actually released, as always. It would feel weird if you didn't.
Score: 8 Votes (Like | Disagree)
Phogro Avatar
50 months ago
In recent memory most final releases have been Monday right? Hoping for today.
Score: 6 Votes (Like | Disagree)
alecgold Avatar
50 months ago
Universal control is really, really great!

Edit: I've tested it on a my (not primary) MacBook Pro 13" and my M1 iPP 11".
It's really smooth, seamless and "it just works"
Score: 5 Votes (Like | Disagree)
grmatt Avatar
50 months ago

Universal control is really, really great!
This is what I'm looking forward to most. ??
Score: 4 Votes (Like | Disagree)
Porco Avatar
50 months ago
I’ve been looking forward to this. Mainly for the FaceID-while-wearing-a-mask option on my iPhone.
Score: 2 Votes (Like | Disagree)