This is definitely a Thunderbird problem and not a certificate problem. I have two computers with virtually identical setups on them, both Windows 8.1 running Thunderbird 31.5.0. One has (had) this problem and the other didn't. After searching for a solution and not finding it I came to the conclusion there must be something wrong with the Thunderbird installation, so I completely uninstalled it. When I say 'completely' I mean I uninstalled the program using Add/Remove Programs (didn't solve the problem the first time) then I also deleted the Thunderbird folder at C: Users AppData Roaming.

Then reinstalled Thunderbird from scratch, which also meant recreating all the email accounts and reinstalling all the add-ons. But the problem appears to be solved. Try office 365 for mac.

I had the same certificate message pop up and thought i would copy it and post it here to see if its of any more help. Could not verify this certificate because the issuer is unknown. Vmware workstation 12 player for mac. An intermediate certificate is the certificate, or certificates, that go between your site (server) certificate and a root certificate. The intermediate certificate, or certificates, completes the chain to a root certificate trusted by the browser. I created a self-signed CA cert using openssl, and imported it into Firefox, but when I select it in the Certificate Manager under “Your Certificates” and click “View”, I see the message “Could not verify this certificate because the issuer is not trusted.”.

This guide deals with 3 ways of making a boot disk from OSX 10.9 Mavericks the first one is the fastest and is done via the Terminal from a new command already in OSX Mavericks called createinstallmedia, the other 2 are older ways when Mavericks was in development and are done with a mixture of finder using Disk Utility and command line. Create bootable mac disk. The next step in the creation of a bootable copy of the OS X Yosemite installer is to use Disk Utility's Restore capabilities to create a clone of the OS X Install ESD image you mounted on your desktop. Repair Boot Disk in Mac OS X with Disk Utility & Recovery HD Feb 8, 2012 - 14 Comments If you have tried to repair the boot volume before in Mac OS X before, you’ll undoubtedly have found the “Repair Disk” option is grey and unavailable within the Disk Utility tool. Work that Terminal — How to make your own bootable macOS 10.14 Mojave USB install drive All you'll need is a Mac, the Mojave installer, and an 8GB USB drive or SD card.