Frequently Asked Questions

Need Some Help?

Send email to and we’ll write back as quickly as possible. Or discuss the issue with fellow customers in the Zengobi Forums.

Lost Your License Key?

Fill out this form and we’ll email it back to you in a flash. Note this only works for products purchased from our Zengobi web store, not from the Apple Mac App Store which has its own integrated receipt mechanism.

macOS Sierra Compatibility

Curio 10 and Curio 9

Both Curio 10 and Curio 9 work with macOS Sierra, although you need to be sure you're running the most recent release. You can verify this via the Curio > Check for Updates menu item which will download and install any updates, if necessary.

Curio 10 also includes changes to support Sierra's native window tabs and Gatekeeper Path Randomization security feature.

If you just downloaded Curio after installing Sierra, you must drag Curio from Downloads to your Applications folder so update checks can occur. Additional details are below in the Installation section.

Older Curio Releases

While older versions of Curio may run on macOS Sierra, editing an idea space text figure will cause a crash due to a change Apple made to Sierra's internal text framework that broke the technique that Curio had previously used to allow the editing of text figures.

If you are running an older Curio and upgrading to macOS Sierra, you can purchase a discounted upgrade to Curio 10 to get up and running again.

Installing Curio

Downloading and Installation

  1. Using your browser, download Curio from the Zengobi website.
  2. Curio will appear in your browser's Downloads folder.
  3. Drag-and-drop Curio from your Downloads folder to your Applications folder.
  4. Optionally, drag Curio from your Applications folder to your Dock if you wish.

Sierra and Gatekeeper Path Randomization

Without going into too many gory details, macOS Sierra introduces a new security feature called Gatekeeper Path Randomization which introduces some issues. The key impact is that Curio will no longer check for updates if it's still located in your Downloads folder. Therefore you must drag Curio from Downloads to your Applications folder to properly install the app so updates can occur.

Access to Contacts, Calendar, and Reminders

When you first launch Curio, the OS may ask if Curio can have permission to access your Contacts, Calendar, and Reminders.

Curio uses the Contacts framework so it can populate your project’s Resources inspector with your name and email to use as a default resource. We also use the Contacts framework when you double-click a dragged-in contact so we can launch Contacts and show that contact to you. That’s it. We do not scan your contacts for any nefarious marketing reasons or to send any contact information to Zengobi’s servers.

Calendar and Reminders
Curio can sync your tasks with Calendar and Reminders however you will need to give permission for this to occur.

Permissions for all of this can also be enabled or disabled via System Preferences > Security & Privacy > Privacy.

Looking for a Curio Release?

Here are the latest versions of Curio's major releases if you need to restore a previously purchased version.
If you lost your license key we can send it to you.

Curio 10Release Notes
OS X Yosemite (10.10) → macOS Sierra (10.12)
Curio 10.3.2
Curio 9Release Notes
OS X Mavericks (10.9) → macOS Sierra (10.12)
Curio 9.4.9
Curio 8Release Notes
OS X Lion (10.7) → OS X Yosemite (10.10)
Curio 8.6.4
Curio 7Release Notes
Edition OS X Leopard (10.5) → OS X Mountain Lion (10.8)
ProfessionalCurio 7.4.4 Pro
StandardCurio 7.4.4 Standard
CoreCurio 7.4.3 Core
Curio 6Release Notes
Edition OS X Leopard (10.5) → OS X Snow Leopard (10.6)
ProfessionalCurio 6.4 Pro
StandardCurio 6.4 Standard
Curio 5Release Notes
Edition OS X Leopard (10.5) → OS X Snow Leopard (10.6)
ProfessionalCurio 5.4.7 Pro
StandardCurio 5.4.7 Standard
Curio 4Release Notes
Edition OS X Leopard (10.5) → OS X Snow Leopard (10.6)
ProfessionalCurio 4.2.4 Pro
StandardCurio 4.2.4 Standard
K-12Curio 4.2.4 K12
Curio 3Release Notes
Edition OS X Leopard (10.5) OS X Panther (10.3) → OS X Tiger (10.4)
ProfessionalCurio 3.2.4 ProCurio 3.2.2 Pro
HomeCurio 3.2.4 HomeCurio 3.2.2 Home
K-12Curio 3.2.4 K12Curio 3.2.2 K12
BasicCurio 3.2.4 BasicCurio 3.2.2 Basic