How do I find the hidden User Library folder in El Capitan?
Situation; a friend has given me a Macbook Pro to upgrade so he can use it with more modern software. The first time it came up it worked perfectly, using his login credentials. Went through the process to get the computer upgraded to El Capitan, which went perfectly, right up through the proper Shutdown sequence. Tried starting up again after letting the Macbook Pro sit for 2 weeks, and now I cannot login to the user account, and there is only 1 admin account on the computer. Happens to be the account that cannot be logged into.
I need to get into the users Home Folder/Library, and now that I cannot login, it isn't possible to use the Go... Finder Window utility. I need to reset the User's account, but Disk Utility is useless these days, although it does fix broken Finder problems. Cannot reset Admin Account Passwords any more either. Yes, I know, Security Risk. But.....
Any suggestions would be appreciated.
MacBook Pro, OS X El Capitan (10.11.5)