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Apr 24, 2020 For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of the Mac operating system. If you still need macOS Mojave, use this App Store link: Get macOS Mojave. The password that you have to input on the helper tool is your system password. See if by changing your system password and whether you are able to use the tool with the new password then. Message 2 of 140 (22,023 Views). Nov 24, 2018 Update for MacOS Mojave pops up, click on install, then a window to install 'new helper tool' pops up. It does not recognize admin. Password, no matter what I do. It just does the 'shake'. I have tested the password on iTunes, System Preferences. During the announcement of macOS Mojave at WWDC most of the features highlighted and one of the most amazing features in macOS Mojave that is Dark mode. Now the entire face of macOS Mojave is easily changeable to dark mode. However, it is the best opportunity to test macOS Mojave on VirtualBox and VMware on Windows PC. Even more, macOS offer. May 19, 2020 Skype keeps asking to add a new helper tool. This happens several times a week, sometimes several times a day, even though I always authorize the installation. I re-installed Skype from scratch but this keeps happening. I am running Skype version 8.11.0.4, Calling version 2017.23.01.38, on macOS 10.13.1 (High Sierra). 

Starting with Firefox version 49, Firefox requires Mac OS X 10.9 (Mavericks) or higher. Visit this Apple Support page to find your Mac OS version.
If you're using an outdated version of Firefox on Mac OS X 10.8 (Mountain Lion) or earlier, the only way you can update Firefox to a secure version is to upgrade your Mac OS to a version that Apple supports. Visit this Apple Support page to learn more about upgrading your Mac.
While insecure versions of Firefox will continue to work on OS X 10.8 and earlier, using an up-to-date version of Firefox on a supported version of Mac OS will provide you with the best and safest user experience.