64 bit

foster556 wrote:

How can I update my system to 64 bit.

Your system is already 64-bit.

This system and app migration from 32-bit to 64-bit has been going on for a more than a decade.

Some of your apps are not 64-bit.

Either don’t immediately upgrade to Catalina—High Sierra and Mojave can run both 32-bit and 64-bit apps, while Catalina retires 32-bit support—or upgrade or migrate or replace your existing 32-bit apps.

Check for updates, upgrades, or newer versions with the app vendors of the apps you use.

32-bit app compatibility with macOS High Sierra 10.13.4 and later - Apple Support

One tool that might be helpful is Go64. Also see RoaringApps.

Check the other discussions of this topic, too.

If you have an Mac with an Intel processor then it supports 64-bit. You may be questioning a popup which was part of Mac OS 10.13.4 that mentions an app not being an app written in 64-bit code. This will popup when opening an app that is not 64 bit. This is because in a future release of Mac OS 32 bit applications will not be supported. The sunset of 32 bit support in the OS has not yet been determined or announced as of yet. However, the "nag" popup is a reminder that Apple will be removing the 32 bit support "soon". To identify what apps are written in 32 bit: Use Finder and open Applications>Utilities and launch the System Information app. This window displays your hardware specifications and basic configuration. Network specifications and basic configuration. AND "Software". In the Software section Select "Applications" (if you don't see this and software has a karat that points to the right, click on it once to switch the karat to point down and expand the options) It may take a couple minutes for the details to load (this is normal) after clicking on Applications. Once the list is displayed looking at the column headings click on the column titled "64-bit Intel" Click on it once so that the karat points up (^) if there are any applications with "No" in this column then they will need to be updated to 64 bit versions to comply with the future OS release. Again the date has not been released, but it is suggested to contact the developer about needing a 64 bit version released to maintain compatibility with Mac OS in the future.

Hope this helps.

Here is a graphic of the steps

Nice work. :)