2025 sparked some incredible conversations across our community 👩💻. Discover the highlights and see what’s ahead in 2026.
Forum Discussion
Andrew-RFLB
8 years agoHelpful | Level 5
Smart Sync and Quick Preview on Mac
Smart Sync causes my quick preview function (spacebar) to not function properly on my Mac. I can't preview thumbnails, or quick preview any videos or photos. Any ideas why this happens?
Likely because you're trying to preview a file that doesn't exist on your computer.
When you set a file to Online Only, the only thing that's left of that file on your computer is the necessary information to make it appear in the folder. Since there's no content in the file, your OS (nor any other program) is able to preview it.
Remember, when you set a file to Online Only, the file is removed from the computer leaving behind only a marker file. In order to access that file, whether it be to open and edit it or simply preview it, the file needs to be on the computer (Smart Sync doesn't allow you to open files directly from the Dropbox servers). When you open a file, it's synced back to your local drive and then opened as normal. When you're done with the file, if you want it to be online-only again, you need to mark it as such.
147 Replies
Replies have been turned off for this discussion
- DanKorkelia7 years agoHelpful | Level 5
Hi Jane,
Yes please keep up to date on this subject. Best Wishes
Dan
- Jane7 years ago
Dropbox Staff
Hey there DanKorkelia & horat10, in order to further investigate what's happening, I’ve sent you a brief message on the email connected to your Forum profile. You may have a look at your inboxes at your earliest convenience if you’d like us to work on that together. Thanks in advance!
- Ideal17 years agoHelpful | Level 5So, have you the solution for this problem, in my case is a big issue?
8/9 months to fix is not good tech support.
Can you help us? - Jane7 years ago
Dropbox Staff
Hey there (Ideal1), rest assured that I’m here to help as much as possible. If it’s not too much trouble for you, can you elaborate a bit on what seems to be the issue on your end, in order to follow-up on the right thing?To best address your concern, please include as much detail as possible on this discussion & I’ll do my best to follow-up with you. Thanks in advance! - Alvpeerz7 years agoHelpful | Level 5
I commented a while ago. I have updated my macbook from High Sierra to Mojave but nothing has changed. Relaunching the finder works for 10 seconds, then it goes back to not showing previews again. This is systemwide, I stop seeing previews of everything in my computer. And here we are.
I'd like to be contacted by support like Jen suggested.
- Jane7 years ago
Dropbox Staff
Hey there ( Alvpeerz ), following your request here, I’ve sent you a brief message on the email connected to your Forum profile. You may have a look at your inbox at your earliest convenience if you’d like us to work on that together. Thanks in advance & happy Friday!
- Ideal17 years agoHelpful | Level 5
Hi Jane,
Mac OS High Sierra. Relaunching the Finder works, for a little while, then back to not being able to preview neither what I have in my computer or what's online.
Is there a way to solve it?
Thank you - Jane7 years ago
Dropbox Staff
Thanks for pinging me back here & apologies for the slight delay in getting back in touch with you Ideal1! I’ve created a ticket on our system on your behalf & you could have a look at your inbox for my message at your earliest convenience, in order to work on that a bit closer together. Thanks again for your cooperation!
- Moonlet7 years agoHelpful | Level 5
So... Clearly this problem affects all (well, many) Mac users. You now know that it's nothing to do with version or OS and you kow it's not related to online-only files so... It's a bug.
Can you assure us you are working on a solution? I, like many, only too the pro option because of Smart Sync and clearly it ain't that Smart!
- Jane7 years ago
Dropbox Staff
Hey there (Moonlet), let me quickly re-phrase that the issue described here pertains to previews not loading while utilizing Quick Previews after the files have been set to Online-only ☁️ & converted back to Local :white_check_mark:. While I’ve tried to explore whether this scenario applies, I haven’t been able to gather the relevant feedback & findings, in order to submit this report to our specialized team. If you’ve gathered any relevant info, I could reach out to you via email directly, in order to investigate in a bit more depth together.Please do let me know how you’d like to proceed in your next post & I’ll follow-up with you asap. Thanks again!
About Apps and Installations
Have a question about a Dropbox app or installation? Reach out to the Dropbox Community and get solutions, help, and advice from members.
The Dropbox Community team is active from Monday to Friday. We try to respond to you as soon as we can, usually within 2 hours.
If you need more help you can view your support options (expected response time for an email or ticket is 24 hours), or contact us on X, Facebook or Instagram.
For more info on available support options for your Dropbox plan, see this article.
If you found the answer to your question in this Community thread, please 'like' the post to say thanks and to let us know it was useful!