Fix McAfee ESM Upgrade problem:
In case you have a problem in upgrade of McAfee ESM to a new version, please follow those steps:
1- Manually copy the update file using Filezilla for example to this location /usr/local/ess/update/
2- Verify the sha256sum for the upgrade file to match the one shown on the download site.
3- Reboot the appliance.
After reboot it will upgrade to the new version of McAfee ESM.