Double-click the iManage Work Desktop for Mac.pkg file and follow the instructions on the wizard to complete the installation.
When you run the iManage Work Desktop for Mac installer for the first time on Apple M1-based Macs, you are prompted to install Rosetta 2 if it's not already installed. Select Install and continue. If you select Not now, iManage Work Desktop for Mac installation can't proceed and the ineligible for installation message appears.
In the Terminal, navigate to the directory where the iManage Work Desktop for mac.pkg file exists. Run the following command to silently install the application:
sudo installer -store -pkg "./iManage Work Desktop for mac.pkg" -target /