|September 2016 NEWSFLASH
Apple releases Security Update for Mac — immediate update advised
It turns out that the serious security vulnerability that was recently patched by iOS 9.3.5 (for iPhones, iPod Touch, and iPad) also impacts Macs. Apple has now patched this for Macs by releasing Security Update 2016-001 El Capitan, Security Update 2016-005 Yosemite, and Safari 9.1.3 (for Mavericks). We recommend an immediate update.
Run Sentinel Maintenance by logging out or choosing "Launch Maintenance" from the M in the menu bar, and this Security Update will be automatically installed. A restart of your Mac will be required. There is no other step you need to take, and you may disregard the rest of this email. (Have a nice day!)
Sentinel clients (monitoring only) and others
Go to the Mac App Store (Applications > App Store) and click on the Updates tab. Depending on which operating system your Mac is running, you will see one of three different upgrades: Security Update 2016-001 El Capitan, Security Update 2016-005 Yosemite, or Safari 9.1.3 (for Mavericks). Both the El Cap and Yosemite security updates contain the Safari upgrade. Install any available Apple updates. A restart of your Mac will be required.
The exploit is unlikely to be in widespread use as it was developed by a shadowy hacking company that appears to work mostly for governments who are targeting specific individuals. Nonetheless, the hack they created is a serious one, so all Macs should be upgraded to at least macOS 10.9 Mavericks, preferably macOS 10.11 El Capitan.
If your Mac is too old to upgrade, you should buy a new Mac. Older models—these will be models in the 2006-2008 range, depending on if they're an iMac, laptop, etc.—that cannot run at least 10.9 Mavericks cannot be secured.
If you require help with these upgrades or have questions, please feel free to contact us. We will be closed for Labor Day, but look forward to assisting you upon our return from the holiday. Thank you.