A technician's first step with an A/C system is to perform visual inspection
Answer:
You can also try to fix corrupted USB drives with First Aid.
Go to Applications > Disk Utility.
Select the USB drive from the sidebar of Disk Utility.
Click First Aid on the top of the window.
Click Run on the pop-up window.
Wait until the scanning process finished.
Explanation:
I suggest you to read OpenSSL changelogs to make it more clear. As there's not enough space to describe how it works. But heartbleed resistan version was 1.0.2, as I know.