Housed myself worry, the 16 GB of RAM give a boost to my MacBookPro end of 2011 (though limited to 8GB by Apple). This gives the memory needed for demanding applications such as Firefox, Photos, iTunes, and it's a treat for Windows Parallels Desktop virtual machine which suddenly can be permanently open (Mac Office apps are only pale copies of their Windows version). Ah yes, replace your HD with a conventional SSD and there is your MBP2011 as a model of 2015! So a good deal.