Hi AnA Kodou,
For the overall Jive platform, OS is not specifically relevant as the typical user will interact with it via a web/mobile browser. For Jive 8, the following browsers are supported - Supported Browsers
For Jive for Office/Outlook it is more specific with the following OS/Microsoft versions -
That being said, if you are experiencing an issue in your instance when using Jive for Office/Outlook, I would recommend submitting a case in your customer group ( MyJive Secret Support Group Administration FAQ ) as a next step so that a member of our support team can assist with further investigations specific to your instance.