We recommend that you install Office 2016 for Mac to have the latest and greatest features and support. Continued mainstream support requires upgrades to Office 2016 for Mac applications as part of Office 365 ProPlus or Office 2016 for Mac.
Office for Mac 2011 client mainstream support ended on October 10, 2017. Then check if you can find Freeze Pane option in Excel with the steps mentions above. This article.( in Most current packages for other Mac programs from Microsoft part) This article and then reinstall Office 2011 for Mac version If you still cannot find Freeze Pane option in the Ribbon, you may try toĬompletely uninstall Office 2011 for Mac with the steps in
Windows group and check if you can find Freeze Pane option.