You can customize the logo of Mac OS Client according to your requirement. The format of the logo must meet the following requirements:
Image format: png, jpg, gif
Maximum file size: 100Kb
To customize the logo, perform the following steps:
Open the configuration file /Library/Security/SecurityAgentPlugins/aucore_login.bundle/Contents/etc/aucore_login.conf.
If the file does not exist, create a new file.
Specify the path of the folder where the image file is stored, in the following format:
Save the configuration file aucore_login.conf.
Restart the computer.