As a result, the communication between the ePolicy Orchestrator server and the Mac fails, and you would be unable to manage the Mac from ePolicy Orchestrator. Without the hotfix HF972377, McAfee Agent will not start on Yosemite. Caution - You must upgrade McAfee Agent to McAfee Agent 4.8 for Mac with HF972377 before upgrading the operating system to Yosemite.Support for Mac OS X 10.10 Yosemite - This release supports Mac OS X 10.10 Yosemite, and the binaries are now v2 signed according to Apple guidelines.