Sometimes outdated software prevents from using computer smoothly. Therefore, the error 50, as well as other errors might occur, due to the outdated software or system. For this reason, you should check available updates and install them:
Go to App Store.
Click Update icon.
If there are any available updates, click Update All button.
In case, all the above steps will not work to fix this Mac error code 50, then you should Check this URL.
https://www.errorsolutions.tech/error/error-code-50/