Because of macOS security policies, performing the following steps won’t take effect if you connect to the macOS machine via Remote Desktop or if the mouse/trackpad is emulated by a 3rd party application (MagicPrefs, BetterTouchTool, Synergy, etc.). If you already have installed the app and cannot load it because of blocked system extensions, please click here for more help.

Note to Apple M1 Users

To install Osiris on Apple M1 hardware, you first need to Allow user management of kernel extensions from identified developers. The related manual chapter will guide you through that process.


1. Download the latest Osiris version for macOS.
2. Run the ​.pkg​ installer.
3. Follow the installation instructions.
4. Start Osiris via Spotlight search or from within the macOS “Applications” folder.
5. Upon the first launch, you will see this message:

6. Click “OK” and wait for the “System Preferences” window to open.
7. Now click on “Full Disk Access” and unlock the settings by clicking on the lock icon in the lower-left corner.

8. Once the settings are unlocked, check the box next to the “Osiris” entry.

9. Start Osiris again. If you still see the message “Application Helper Authorization denied by macOS”, check the troubleshooting section on the bottom of this page.
10. Once you have created your first Osiris mount and attempted to mount it, you will see the following messages. It might be that you see two different messages for the same thing, but please focus on the message as shown here:

11. Click on “Open Security Preferences”
12. Once the “Security Preferences” window is open, click on the lock in the lower-left corner to unlock the settings.

13. Once the settings are unlocked, click on the “Allow” button next to the message “System software from developer “Benjamin Fleischer” was blocked from loading”.


I have granted Osiris “Full Disk Access” but I still see the message “Application Helper Authorization denied by macOS”.

1. Go to “System Preferences” → “Privacy” and click on “Full Disk Access”
2. Check the box next to the entry “io.projective.osiris.continuumtransfunctionerhelper”

3. Start Osiris again

Need more help with this?
Visit the Projective Support Websites

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