Disk Utility on OS X El Capitan is equally unfriendly therefore I keep an older version. I formatted a USB with FAT and it wasn't recognized on Windows PC. Reformatted again with the Mavericks DU and it was visible on Windows OS. This is just one case. Partitioning is sometimes a headache on the...
Thanks for your reply mate.
I think removing the Yosemite partition and adjusting the free spaces to the OS X El Capitan should ensure a smoother performance. isn't? Should I get rid of Yosemite or Mavericks?
Of-course you can keep this machine and use it in a best possible manner if you really know how to use it. 8 GB RAM upgrade is not bad at all. I kept my old Mac for a quite long time until it's hardware failed.
My Mac 500 GB, 4 GB RAM have OS X El Capitan, Yosemite, and Mavericks. Will my Mac performance degrade using 3 OS X on the same machine? I mostly use 10.11.5 and occasionally 10.9.4.