Postlab is bundled with macFUSE to connect to Drive's cloud storage, making it behave like a local network mount on your Mac.
macFUSE is a macOS kernel extension used to create virtual filesystems. It's built and maintained by Benjamin Fleischer. (More information: https://osxfuse.github.io) The macFUSE variant bundled with Postlab is called lucidfs, which is part of our LucidLink implementation.
Apple introduced additional security measures that add some extra steps to installing kernel extensions. On Apple silicon computers, this also requires a boot mode.
Using macOS 13 (Ventura)? Having trouble installing macFUSE? Reach out: [email protected]
Let's start with the most common issues:

Postlab says macFUSE not loaded, or I don't see an Allow button in System Preferences

macFUSE not loaded
macFuse is not loaded. Please reinstall macFuse.
After installing Postlab, macFUSE needs explicit permission to run on your Mac. If macFUSE wasn't granted permission during installation, here's how to grant it permission manually:
1. Reboot your Mac.
2. Immediately after rebooting, go to System Preferences and navigate to Security & Privacy.
3. On the General tab, click Allow to allow software from developer "Benjamin Fleischer" to run. You'll need to reboot once more.
4. That's it!

Apple silicon

Using Postlab Drive on Apple silicon? First, you'll need to set your Mac's security policy to "Reduced Security" to be able to load signed kernel extensions:
1. In System Preferences, go to the Security & Privacy preference pane and click General.
2. Next, click Enable system extensions..., then click Shutdown when prompted.
Enable system extensions
Shutdown to boot into the Security Utility
3. Shut down your Mac.
4. Press and hold down the power button until your Apple silicon Mac boots. Your Mac will either send you directly into macOS' Recovery environment, or you'll see an Options button leading to that.
5. Log in with your user account and select the disk you want to use.
6. In the menu bar, go to Utilities, then select Startup Security Utility.
7. Click Security Policy...
8. Select Reduced Security, then enable: Allow user management of kernel extensions from identified developers .
9. Click OK.
10. In the menu bar, select Shut Down.
11. Turn the Mac back on (press but don't hold the power button this time) and log in.
12. After rebooting, macOS should prompt to Open Security Preferences. If macOS doesn't prompt you, launch System Preferences then go back to Security & Privacy > General.
13. Click the lock bottom left-hand and enter your password.
14. Click Allow. You'll need to reboot once more.
15. Once your Mac restarts, relaunch Postlab and you'll be able to connect to Drive (POSTLAB CLOUD > Drive).

Still no success?

Try loading the kernel extension manually in Terminal:
macOS 11 and newer
macOS 10.14.6-10.15.7
sudo /usr/bin/kmutil load -p /Library/Filesystems/lucidfs/lucidfs.fs/Contents/Extensions/11/lucidfs.kext
kextload /Library/Filesystems/lucidfs/lucidfs.fs/Contents/Extensions/11/lucidfs.kext
If that returns an error like system policy prevents loading and/or doesn't load macFUSE, your computer is very likely under IT management policies that prevent kernel extensions to load. Talk to your IT department first, they'll know what to do.
Last modified 2mo ago