Without this access, TeamViewer users connecting to macOS 10.14 or higher will only be able to view the screen but not control it with their mouse or keyboard.
And TeamViewer users connecting to macOS 10.15 or higher will additionally only be able to view the desktop background and the TeamViewer app, but not any other applications at all.
Note: TeamViewer is not able to grant this access by itself, nor can the access be granted remotely through a TeamViewer connection from another computer.
Full Disk Access
|TeamViewer requires Screen Recording access so remote users can see your screen in Remote Control Sessions and Meetings||TeamViewer requires Accessibility access so your mouse and keyboard can be controlled remotely.|
TeamViewer requires Full Disk Access to access files and folders on your Mac for File Transfer (sending and receiving files in general).
By default, all permissions are set to Denied. Please give permission to the system capabilities manually to use TeamViewer as desired. If you or others need to access the Mac remotely, Screen Recording and Accessibility are required at a minimum.
Note: If you are managing Macs in your organizations through an MDM system, you can use Privacy Preferences Policy Control (PPPC) payloads to configure Accessibility and Full Disk Access permissions. Your users will still need to grant Screen Recording access themselves, this permission does not require admin credentials.
To allow the access, click the buttons shown in the dialog. Eg. click to allow Accessibility, click on Request Access... - then confirm by clicking on Open System Preferences
which will bring you to the Accessibility section of the Privacy panel, inside the Security & Privacy preferences:
For the Accessibility access, you will need to click the padlock icon in the lower-left corner to make changes. You might be prompted to enter the credentials of an administrator account to continue.
Put a check next to TeamViewer to grant it access: