Macbook Pro 5 4 Yosemite

Macbook Pro 5 4 Yosemite

Sep 18, 2020 Use this information to find out which MacBook Pro you have, and where it fits in the history of MacBook Pro. Your Mac provides several tools to help you identify it. The simplest is About This Mac, available by choosing About This Mac from the Apple menu in the upper-left corner of your screen. Apple released the new Mac OS X 10.10 Yosemite in the Mac App Store for everyone to download and install for free on October 16th, 2014, but downloading a 5+ GB file for each of your computers will take some serious time. The best thing to do is download it once and create a bootable install USB drive from the file for all of your Macs.
Hi,

No reason I can think of, except the possibility that you may have to upgrade some apps or replace them with something else. See http://roaringapps.com/apps to check compatibility.

El Capitan is the highest OS you can upgrade to: https://support.apple.com/en-us/HT206886

You should not notice a performance difference between Yosemite and El Capitan. El Capitan is basically a 'refinement' of Yosemite, not a major overhaul with additional features like Sierra is. As with (almost?) any Apple OS upgrade, security is improved. As you know, you may have to purchase newer apps for El Capitan. Some apps which come with the OS will offer updates once you upgrade to El Capitan.

Whether you stay with Yosemite or upgrade to El Capitan, you should upgrade your RAM to 8GBs, the maximum it will allow.
Windows 7 on new macbook pro. Macos mojave macbook air 2014. 
If you decide to replace your aging HD, consider a SSD for much improved read/write performance.
 Jul 30, 2017 2:10 PM 
If you're using one of these computers with OS X Mavericks or later, you can install macOS Catalina. Your Mac also needs at least 4GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier. Learn how to upgrade to macOS Catalina.
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