The macOS Sierra release date is tomorrow, ahead of a new MacBook Pro. Today we take a closer look at what we know about the macOS Sierra release date and macOS Sierra release time for Macs.
Apple announced macOS Sierra at WWDC 2016 in June, and we’ve been testing it with Developers ever since. Now Apple is ready to roll out the big upgrade that brings Siri to the Mac to all users.
We know many of the new macOS Sierra features and which devices will receive the macOS Sierra update this month.
Apple rolled out the latest macOS Sierra beta earlier this month and announced the full macOS Sierra release date for the iMac, MacBook, MacBook Pro, Mac Mini, MacBook Air, and Mac Pro.
Here’s what you need to know about the macOS Sierra release date.
Here’s everything we know about the macOS Sierra release date, including what you need to know about the specific date, possible macOS Sierra release time, and downgrade option.
macOS Sierra Compatible Computers

macOS Sierra works on most computers, but not all features are available.
Apple is good at providing updates to older computers and phones, but there’s always an outage.
If you have a Mac released in late 2009 or newer, you can probably run macOS Sierra. The full list of macOS Sierra compatibility is below.
- MacBook (Late 2009 or newer)
- MacBook Pro (Mid 2010 or newer)
- MacBook Air (Late 2010 or newer)
- Mac mini (Mid 2010 or newer)
- iMac (Late 2009 or newer)
- Mac Pro (Mid 2010 or newer)
Some Legacy macs don’t have all the same features. For example, you need a 2013 or newer Mac to use Auto Unlock. You also need a new Mac to use Apple Pay on the web and use features like Handoff, Instant Hotspot, and Universal Clipboard. There may be workarounds to get macOS Sierra on an older Mac, but you should be careful if you’re not experienced.
macOS Sierra Release Date
The macOS Sierra release date is September 20.
The macOS Sierra release date isn’t tied to a new MacBook Pro or MacBook Air, as we might expect. Apple has announced that the macOS Sierra release date is September 20.
Apple has rolled out software updates so users can install iOS 10 and watchOS 3.0 before upgrading to macOS Sierra. If you’re using one of the older Macs, this is a good time to investigate what beta testers have come up with for macOS Sierra performance on your Mac.
macOS Sierra Release Time
You shouldn’t expect a macOS Sierra release time at midnight September 20. While Apple hasn’t announced a specific time, the company is pretty predictable in this area.
We expect macOS Sierra to be released on September 20 at 10:00 PM Pacific, 1:00 PM Eastern. If you live in other countries and time zones, here’s a breakdown.
You can expect a big rush for the first 30 to 60 minutes when the update is available, so you might want to wait for it to pass and avoid slow downloads or errors.
macOS Sierra Clean Install

Wait for an option to do a clean install of macOS Sierra.
You’ll find the macOS Sierra update on the App Store as a free download that installs and upgrades your current OS X El Capitan installation to macOS Sierra.
If you want a fresh start that can get rid of some issues or issues, you can perform a macOS Sierra clean install using a USB drive.
Here’s how to perform a clean install of macOS Sierra as the release date approaches. This is a good idea if your Mac is older and you haven’t done a clean install in years.
Downgrade from macOS Sierra to OS X El Capitan
If you have problems with the macOS Sierra update after installing it, you can count on downgrading from macOS Sierra to OS X El Capitan.
It’s best to wait a few days to see how others like the update and make sure your favorite apps and accessories are still working – but if you jump right in and have a second thought, you can downgrade.
If you think this might be something you should do, you should perform a Time Machine backup of your Mac before upgrading to macOS Sierra. Here’s how to switch from macOS Sierra to OS X El Capitan.
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