jemma73 Said:
"Cannot Upgrade to OS Big Sur from OS Yosmite X 10.10.5: I try to upgrade from OS Yosmite X 10.10.5 on my Macbook Pro (Mid 2014) to OS Big Sur and when I press 'get' it comes up with: 'The server gave an error during download: 500 Internal Server Error. Internal Server Error.' How can I upgrade to a newer software? My app store doesn't ever show any updates available."
-------
About that Error:
That error (500 Internal Error) is all about your device not being able to communicate with Apple's servers. So, try creating a new administrator user, and see if it them works. If of no success, then boot into Safe Mode (By holding down the shift key upon boot), seeing if it them works. If an available option for you, try connecting to you router hardwired (through use of an Ethernet cable).