Can I upgrade from Yosemite to Sierra?

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Tags

1. #sierra
2. #strongly
3. #system
4. #other
5. #operating
6. #upgrade
7. #ensure
8. #yosemite
9. #features
10. #remain
11. #advised
12. #supported
13. #possible
14. #university
15. #apple
16. #compatible
17. #longer
18. #users
19. #systems
20. #macos
21. #latest
22. #security