Editing contacts in iMac

Hey there and welcome to Apple Support Communities ChiWarbler,

We can certainly understand your concern and can help provide some insight.

We recommend checking out these steps on what to do if your Mac apps starts to freeze.

" If an app freezes or quits unexpectedly on Mac

When an app on your Mac stops working, try these suggestions.

• If an app doesn’t quit as expected, or it’s unresponsive, you can force quit the app (you may lose unsaved changes). Choose Apple menu  > Force Quit, select the app in the dialog that appears, then click Force Quit.
• If the app quit, reopen it by clicking Reopen in the dialog that appears.
• Restart your Mac by choosing Apple menu > Restart.
• Make sure the app is compatible with your version of macOS.
• Open another file in the app. There may be a problem with the original file.
• Check for updates to your software.
• Disconnect any peripheral devices you just connected (for example, a printer). They may not be compatible with your version of macOS.
• Uninstall any app plug-ins or enhancements from other manufacturers.
• If you recently updated the app or macOS, a plug-in or enhancement you installed may no longer be compatible.
• Diagnose problems with your Mac to learn whether hardware you installed, such as additional memory, is incompatible, improperly installed, or defective. "

For additional information, check out this link: If an app freezes or quits unexpectedly on Mac - Apple Support

These steps will help ensure your device is working with ease and can fix common issues like the ones you’re experiencing.

Kindest regards!

Thanks R_Gabriel,

I think that what Chi Warbler is talking about is not about this app quitting or freezing, but instead being VERY glitchy. For instance, when you go to add a contact on the iMac Contacts app, and put in the first name of the contact and tab to hit the last name, the contact that you've started to add to disappears and another contact pops into place. This happens constantly to me-there's no freezing of the app or anything, just an unexplained jump to another contact while you're creating one. This doesn't happen on the iPhone or iPad. This is, mildly put without resorting to obscenities, quite frustrating.

Restarting the iMac doesn't help, incidentally.