Is it possible to connect and reconnect a keyboard with the computer on?

I have now 2 iMacs Office sitting side by side on my desk.  Since I want a keyboard with a numeric keypad on the right side, I found the only way to get that with an Apple keyboard with a USB connected keyboard.  Therefore, when I want to knit back and forth between macs, I have to unplug the keyboard of one and then plug it in another one - and back.  It would be a hassle to turn off mac whenever I need to do that, so I was wondering if it would damage a computer.  Two usb ports are usb powered external hubs.

There is no problem with the device on a keyboard with the computer and plug in another.  It's only external drives that need to be removed before unplugging.

Tags: Mac

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