Yes, ‘master’s degree’ takes an apostrophe. The apostrophe shows possession: the degree of a master. The same goes for ‘bachelor’s degree.’ Do not use an apostrophe for the plural. ‘Many master’s degrees were awarded’ is wrong. Write ‘many master’s degree holders’ or rephrase.
Capitalization depends on use. Keep ‘master’s degree’ lowercase in general references, as in ‘She holds a master’s degree in biology.’ Capitalize formal degree names: ‘Master of Arts,’ ‘Master of Science,’ ‘Master of Business Administration.’ The capitalization rules page has more examples.
Abbreviations follow the formal name. M.A., M.S., and MBA are standard. Style guides differ on periods, so pick one form and stay with it. Check when a master’s degree is capitalized if you are unsure.
On a resume, accuracy matters. Write the degree exactly as your school names it. List the school, the degree, and the year. These resume writing tips show how to format the education section.

