A:AnswerOffice Home and Student 2019 will need to be installed in the US but can be used outside of the US. Your Mac will need to meet the system requirements here: https://aka.ms/AA4rinl.
A:AnswerYou should have received a product key to use when installing Office Home and Student 2019. You should have also received a link to the download from Best Buy.
A:Answerusually depends upon their EOL/EOS for this. But as long as you don't Upgrade to a OS version that doesn't support this version of excel you should be good.
Believe MS allow you to edit and save but newer macros or functions might be missing even when you upgrade to newer OS on Windows mostly.
A:AnswerIt must be compatible and ensure enough memory. But the digital is made for self install, instructions are easy to follow. You can always ask BB before you buy.