Upgrading 2012 macBook Pro

AngelV1993 wrote:

I was given a MacBook Pro 2012 just this year(2022) and it is completely out of date. Is there a way I can update it to the most recent upgrades or am I better off getting a new one? I tried to upgrade it to catalina but when it asks me to sign into the App Store it tells me my information is wrong but I can go on my phone with the same information and it works perfectly fine. I don't do much on my laptop, I do write stories and i go on the internet but nothing to big or special.

Not the most recent macOS, your mac is 10 years old. The mid-2012 was real work horse, I still have a 15" for a hardware backup.

—If the Mac was prepared properly...it should be ready to go

ref: What to do before you sell, give away, or trade in your Mac

verify you are using the Safari browser to download/initiate the macOS links.

The older macOS installer backups on this server:

How to download macOS - Apple Support

the newest macOS your machine can run—

Catalina macOS 10.15.7

macOS Catalina - Technical Specifications

System requirements macOS 10.15 Catalina

macOS Catalina will run on all Macintosh computers that supported Mojave:

MacBook: Early 2015 or newer

MacBook Air: Mid 2012 or newer

MacBook Pro: Mid 2012 or newer

Mac Mini: Late 2012 or newer

iMac: Late 2012 or newer

iMac Pro

Mac Pro: Late 2013 or newer; Mid 2010 or Mid 2012 if upgraded with a recommended Metal-capable GPU

AngelV1993 wrote:

Why wont my App store on my Mac accept my Apple ID and password but I'm signed on my iCloud and google account (different email). This morning I went to the App store to try again and now macOS Catalina isn't popping up.

Sign out and back in again if you have an issue with your Apple ID

Sign out of iCloud on your iPhon...Mac, etc ...

ref

Check your Apple ID device list to see where you're signed in - Apple Support

The older macOS  installer backups on this server: 

How to download macOS - Apple Support

Further help if no resolve—

If you think your Apple ID has been compromised

Contact Apple for help with Apple ID account security - Apple Support 

AngelV1993 wrote:

Why wont my App store on my Mac accept my Apple ID and password but I'm signed on my iCloud and google account (different email). This morning I went to the App store to try again and now macOS Catalina isn't popping up.

Did you perform a clean install of macOS by first erasing the whole physical drive before you started using the laptop? Here is what the previous owner should have done prior to getting rid of their Mac (one of the steps is a clean install of macOS):

What to do before you sell, give away, or trade in your Mac - Apple Support

You generally have to follow that 'give away or sell your Mac' article to the letter, and install the factory original (or oldest still available) MacOS.

Next, use your Apple-ID to obtain 10.11 El Capitan (if not already 10.11 or better) as a Waypoint to get the updated Mac App Store.

Once you have installed 10.11 El Capitan or better, later versions will be come more readily available.