AirPort Time Capsule won’t work in the future

If you’re still backing up your Mac to an AirPort Time Capsule, you may have seen a warning after upgrading to macOS 15.6 Sequoia:

Disk Not Recommended for Backups. Future versions of macOS will no longer support Time Capsule disks for Time Machine Backups.

or (if you have upgraded to macOS 26)

Disk Not Recommended for Backups. The next major version of macOS will no longer support Time Capsule disks for Time Machine backups.

Time Capsule backups are no longer supported in macOS 27 or later. Macs running macOS 15 Sequoia or macOS 26 Tahoe can still use them, but you should set up a replacement backup before upgrading. Apple’s Time Machine guidance confirms that Time Capsule and other AFP backup destinations are unsupported in macOS 27 and later.

Time Capsule was a great product: a Wi-Fi router with a built-in hard drive for Time Machine. Sadly, it’s based on old technology. The last model was released in 2013. It uses Apple’s older AFP file-sharing protocol, which macOS 27 and later no longer support for Time Machine. Modern network backup destinations use SMB.

How do I know if I’m using a Time Capsule?

The Apple AirPort and Time Capsule product line is pretty iconic, so you should recognize them. They are white plastic rectangular boxes with an Apple logo on the top. Some of them are short and flat, some of them are tall and skinny. But just because you have one of those doesn’t mean that you are using it for Time Capsule. It could simply be your WiFi router (which is probably due to be replaced anyway; more on that later).

To check your backup destination, go to Apple menu > System Settings > General > Time Machine on each Mac. You’ll see any configured backup drives. If one says “Time Capsule” or “AirPort,” arrange a replacement backup.

Yes, there are wireless replacements, but they’re fussy

There are network drives, NAS boxes, and some routers that support Time Machine over the new file sharing standard. The catch? They are fussy and confusing to set up. There are too many things that can go wrong. That was the magic of Time Capsule: it was easy enough for almost any Mac user to set up themselves. Until someone makes a product that is as easy to use as Apple’s (I believe it’s possible, but no one has done it yet!), I cannot recommend a wireless backup to any of my customers. Not even I have a wireless backup system anymore because it’s too much of a hassle for me.

My recommendation: use a simple, fast external SSD

The most reliable, least finicky option is an external SSD you plug into your Mac. Leave it connected on a desktop; connect it once or twice a week on a laptop.

Why this is better for most people:

• Set-and-forget simple. No network tweaks, no router quirks, no need to reconfigure if you move or change Internet providers.

• Fast. An SSD can make backups and restores faster than an older hard drive. The time needed depends on how much data you have and how the drive is connected.

• Portable. Unplug and store safely when you travel or have company.

See my specific backup drive picks here. I recommend a drive that is at least twice the storage capacity of your computer. My Time Machine SSD upgrade guide explains the switch and how to keep your existing backup history.

Apple’s guide to Time Machine walks you through setup, but I encourage my customers to book a short appointment with me to make sure it’s all set up properly and to answer any questions you might have.

What about iCloud? Isn’t that a backup?

iCloud does protect your data, but it works differently from a true backup. If you’ve turned on iCloud for Photos, Contacts, Calendars, Documents, and more, then even if your computer is lost or destroyed, your important content can be restored.

But iCloud is a sync service: when you edit or delete something, the change happens everywhere instantly. That’s where Time Machine is different. Time Machine keeps older versions of files and even deleted ones for months or years, depending on your backup drive size. It also saves everything on your Mac—apps, system files, settings, and documents in odd places—so you can fully restore your computer. With Time Machine, a new Mac can basically be a clone of your old one.

While you’re at it: consider upgrading your Wi-Fi

While Time Capsule will continue to work to provide your home with WiFi, this might be a good time to consider upgrading your WiFi as well. The final version of Time Capsule uses WiFi 5, but the current standard is WiFi 7. Newer generations are faster, more responsive, have a farther range, are less susceptible to interference, and have better security. There are new WiFi systems like eero (my recommendation) that create a “mesh” allowing a single WiFi network to cover a large home.

Can I just avoid upgrading to macOS 27?

A Mac running macOS 26 can still use Time Capsule for Time Machine, but do not rely on that as your only long-term plan. A replacement Mac running macOS 27 or later cannot use that backup directly. Set up a supported replacement backup while your current Mac is working, and keep the old Time Capsule backup in case you need files from its history.

Before replacing or upgrading your Mac, confirm that its new backup has completed successfully.

Bottom line

• Replace your Time Capsule backup before moving to macOS 27 or later. Keep the old backup while you establish and check the replacement.

• The simplest, most reliable fix is an external SSD you plug into your Mac. Follow Apple’s Time Machine steps and you’re done. 

• Consider upgrading Wi-Fi too—your Time Capsule’s wireless is two generations behind. 

If you want help picking the right SSD or setting this up, I can do it with you in a short appointment.