If you are still Mavericks user or Mountain Lion user, you have a major update to download

If you have not yet migrated your Mac to Yosemite, either by choice or simply because your Mac does not support it, be quiet, Apple continues to maintain your operating system. Whether Mavericks or Mountain Lion OS you have installed on your Mac, both just received an update that fixes several vulnerabilities.

This security update for both operating systems, 2015-001, is not an upgrade itself, but comes to plug some holes which also corrected the latest version of Yosemite launched last day 27, the 10.10.2.