My gmail disappeared how to get it back

Google has discontinued support for the menu bar notifier. Not an issue with your system.

Point your web browser at http://www.gmail.com

If another account comes up, sign out of it by clicking the avatar in the upper-right then clicking "Sign out."

If you then still can't sign in to your account, click the "Need help?" link on the sign-in page.

Click the "Need help?" link on the Gmail sign-in page.

You need to read this page on adding another account, or you can change the primary account on the MAC.
Mac Basics Use Mail on your Mac

Also check your ITunes set-up if that is what you are using to the transfer.

This web site should answer your question:

http://www.tothepc.com/archives/no-call-phone-button-in-gmail/

Point your web browser at http://www.gmail.com

If another account comes up, sign out of it by clicking the avatar in the upper-right then clicking "Sign out."

If you still can't sign in, click the "Can't access your account?" link on the sign-in page.

From which toolbar did Gmail disappear?

Launch the browser, type in the search bar gmail login and follow the link. When the login page is displayed, press CTRL +D and save as a bookmark. Next time use the bookmark.

my apple has a scrollbar that prevents me from going to the top for my facebook log in page and my sound want work how do i fix these problems

Chrome and every browser stores each and every page that you opens in it and it is called as "History". After opening chrome simply press CTRL + H (windows) & COMMAND + H (mac) to open the history and then simply navigate, find the page that you were on and click it. The page shall be opened again.

Secondly, if you only have one window open and no tabs, then you can simply go to forward and back button on the left side of address bar and can navigate back and forth.

Try using a different browser. It is either that or your bandwidth is subpar.