The mail icon on my dock disappeared.

"Very easy!

Open the Application folder and locate your Mail application you want (in case you have more than one) then select it hold your mouse button and drag it to the dock where you want it. Wait a sec so it knows that is what you want and it will place the dock alias there (won't physically move the app or alter it)."

Can you find your "Applications" folder on your hard drive? If so, go in there and find the Mail application icon (Mail.app). Drag that icon to your dock. This should put it back. If you are using another mail program, drag that app instead.

"Just in case you find this thread but can't find your mail app icon, try this:

My mail icon was not in the applications folder, so I did a search on my finder. I typed in ""mail"" and then found all my individual email files. I still couldn't find the mail app, so I clicked on a random email file and my computer automatically opened the mail app to open the email. I then saved it to my dock again."

"Periodically, when I close it, it disappears from my Dock. I just run it again, it shows up somewhere else on the dock, and I move it back.

I run it from Spotlight, but could run it from applications or on some keyboards there's a key that shows all of your apps on the screen, from which you can find mail, or type in ""m"" or ""ma"" or ""mai"" or ""mail"" to get the app."

"When I opened my Macbook Pro this pm, most of icon in the dock not shows the picture

but once i apply on the place . then the app will work"

"I just had the same problem

first my doc would disappear and only show up when I had the mouse over it

I checked preferences - Automatically Hide and Show the Dock was unchecked

I checked it.. then unchecked it...

so now the dock stays visible

but Mail disappeared

I opened the program... then left clicked and said KEEP in DOCK

now it is gone again

... the Dock seems to have some new *features* hope Apple fixes them as some would call them bugs!"