In the latest release of macOS Sequoia (macOS 15), the location of the virtual camera permission on OBSBOT Center has changed. Please follow the steps below to enable the permission.
For the versions before macOS 15, please refer to this article.
Step 1: Open "System Settings" from the menu. Click "General" in the sidebar of the window that opens.
Step 2: Choose "Login Items & Extensions", then click the Exclamation Mark behind the "Camera Extensions".
Step 3: Turn on the permission for OBSBOT Center, and click the "Done" to finish the setup.
After completing the above steps, the virtual camera function in OBSBOT Center is ready to work on macOS Sequoia.