How do I request full desktop site in Safari (10.1.2) on MacOS Sierra?

Please use the following procedure to determine if the problem is isolated to your Mac, or lies elsewhere.

1. Shut down your Mac.
2. Load macOS Recovery by holding ⌘ and r (two fingers) while you start your Mac with a third finger.
3. At the macOS Utilities screen, release those two fingers.
4. Choose Get Help Online.
5. Safari will launch, but it will lack your bookmarks, favorites, history and other preferences.

While in that mode, please determine if the Citibank website correctly loads the desktop site or not.

If the problem does not occur in Recovery mode, but returns after restarting your Mac normally, please read If Safari is slow, stops responding, quits unexpectedly, or has other issues - Apple Support. The applicable section is "Remove Internet plug-ins and other add-ons" and the Support documents that follow "Learn more".

Thanks, my Mac loads the desktop site but of course that doesn't help you.

Please review all the suggestions inIf Safari doesn't load a page or webpage items are missing - Apple Support. Additional suggestions can also be found in If Safari is slow, stops responding, quits unexpectedly, or has other issues - Apple Support.

Needless to say, if you are using any non-Apple "anti-virus" or "Internet security" junk, anything at all in that broad category of garbage, don't. A lot of things won't work if you do.

On a desktop or a laptop Safari should open the desktop version by default, unless you used the mobile website address.

Click on the circular icon on the right side of the address bar and see if you get the “open desktop” option.

I suggest you use the program created by Etresoft, a frequent contributor. It will provide a snapshot of your system which we can analyze to possibly determine the cause of your problem. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

Hopefully someone will have another idea. I just get what I assume is the normal interface in Safari, Firefox, Chrome etc.

Safari…

What did your bank have to say when you asked them about this issue?

What bank?

What happens if you only type citi.com then return?

The only thing I can think of to try is going into Safari Preferences > Privacy > Manage Website Data… , scroll down to citi.com, select it and press the remove button.

Have you checked your Mac for adware?

I checked my Mac and work perfectly normal.