Dropbox ending support for Sierra in June 2023

Going in the other direction, Dropbox will be ending support for macOS 10.12 Sierra in June 2023.

From Dropbox support:

We’re writing to notify you that in June 2023, Dropbox will be ending support for macOS 10.12.

Your files are still secure with us. In addition to supported Mac Operating Systems, you can still access your files from supported web browsers, iOS and Android apps.

What to do next:

We want to help! To continue use of Dropbox without interruption, we recommend affected users upgrade to the latest supported versions.

What does that mean exactly? The website will still work right?


As I read it, it means they are dropping support for the Mac app on 10.12 (not clear if existing installations will continue to work).

The web site will continue work fine - they explicitly say so. If they are using some feature not supported by Safari, you may need another web browser, but that shouldn’t be a showstopper, because the latest Firefox still works on Sierra.

Unfortunately, Maestral can’t help here because it requires macOS High Sierra (10.13).

According to a post in the Dropbox Community forums, the Mac app will stop working on macOS 10.12 Sierra systems on June 27, 2023. Your Dropbox folder will still be on your Mac, but it will stop syncing.

My recollection is that is what happened when Dropbox stopped supporting previous versions of macOS in the past, like El Capitan.

Depending on user requirements, a few paid alternatives might work. At the moment, CloudMounter, Mountain Duck, and Strongsync still support Sierra.

Unfortunately, it’s hard to recommend any solution other than upgrading to a newer version of macOS. Sierra’s last security update was three and a half years ago, and it’s only a matter of time before the alternative Dropbox clients will stop supporting it.

I presume that the Dropbox client will continue to be supported for a bit longer (maybe another year?) on macOS 10.13 High Sierra.

High Sierra should run on any Mac that runs Sierra, so unless a user has a specific app on your Mac that won’t run on High Sierra, moving to High Sierra (or newer, if possible) probably is the best option.

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The main reason I never upgraded my MacBook Air from Sierra to High Sierra is because the upgrade forces a file system conversion from HFS+ to APFS.

I am pretty sure there is something wrong with this Mac’s SSD because when I tried to turn on FileVault (several years ago), the encryption process wouldn’t complete after several days (this is a small 128GB SSD), just sitting on my desk connected to power and doing nothing (not sleeping either).

And it wouldn’t let me turn FV off either, because the encryption was in progress.

I ended up wiping the Mac and restoring from a backup in order to recover.

So I’m understandably nervous about any other whole-file-system operation like an APFS conversion on this computer and won’t upgrade to High Sierra because (as far as I know), there’s no way to upgrade without converting the internal SSD.

I recall your saga from the old MacInTouch forums. I’ve kept a 2010 MacBook Pro running on Sierra in part because of your experience and also from inertia and a general sense of unease over the bugginess of the early versions of High Sierra. I use the old MBP solely for connecting to an old scanner in my home workshop, with the scanner output automatically going to a synced Dropbox folder. I’ll either try to eke out a little more service from the MBP by moving to High Sierra or just replace it with a basic Windows or Linux machine.

I was able to upgrade to High Sierra years ago without converting to APFS. I don’t know if this still works though: How to clean install Mac OS High Sierra without APFS on internal SSD

I installed High Sierra on an SSD that was formatted as APFS. I then did a SuperDuper! clone to an external spinning HFS+ drive. Upon completion, I reformatted the internal SSD to HFS+ then re-cloned the copy of High Sierra on the external drive to the internal SSD. Been running High Sierra using HFS+ since then.**

**But I never really used High Sierra. It was a required intermediate step to get my MacPro 2010 from Sierra to Mojave.

We’re writing to notify you that in June 2023, Dropbox will be ending support for macOS 10.12.

Closing the loop on this thread:

Dropbox did give a little bit of a grace period, as I was able to use the Dropbox client on a Sierra machine on July 21st, but when I booted that system today, the client warned that syncing had stopped and an OS upgrade was required for future use.

You might investigate Maestral.app. Caveat: I have only used it on Sonoma. I have no systems running early than Ventura.

No, Maestral doesn’t run on Sierra. I’m in the same boat – Dropbox just stopped working one day with no warning and I have no workaround.

Extremely frustrating since I have legacy software I have to run on that system and can’t upgrade, and I use Dropbox/Maestral to sync all my work to all my machines.

I thought when Dropbox said it was “ending support” they meant the client would no longer be updated and future versions of the client wouldn’t run on Sierra. I had no idea it would just stop syncing! Their warnings were not clear at all.

I don’t understand why, either: if it worked, what is wrong with leaving it working? If they’re trying to force me to upgrade, that isn’t going to work since I can’t upgrade that machine. All it does is make me want to check out other syncing services and stop paying for Dropbox.


I hear your frustration. Don’t get it either why they would disallow use rather than just stop updating.

Just a naive suggestion. Would you be able to get around this by setting up your ~/Dropbox folder on a newer macOS client as an SMB share that you then access from the Sierra Mac?

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