Macintosh Mouse M5769 does not physically fit into Apple Keyboard M2452

Hi,

I have an M2452 (bondi blue) keyboard in front of me. The ports (1) and (2) have standard USB connectors, and would work with any USB Type-A plug (your keyboard's USB plug should fit, although it serves no meaningful purpose).

The USB-A port and plug conform to an industry standard, so you shouldn't find differences between manufacturers. Through the process of elimination, the USB plugs on the keyboard and mouse can be inserted into the back of the computer, so that rules them out as the cause of the problem. It's interesting that both USB ports on the keyboard prevent the plug from being fully-inserted. New ports are normally snug and can be dry when attempting to insert the plug. Have you tried inserting the keyboard's own USB plug into either port? If it hangs up midway, the problem lies with the keyboard. Have you examined the keyboard's ports with a flashlight and magnifying glass to check for oxidation or (worse yet) bent pins? You've indicated that the keyboard is NOS, but with anything that has sat somewhere in storage for years, you never know if it was damaged by a customer shortly after its original purchase and then exchanged for another, before it acquired a "used" look. As for the Pro Mouse, it has no strain relief where the cable exits the mouse, so I recommend using it gently to prevent shorting it out from repeated flexing at that spot. I don't think buying another mouse is necessary.

Thank you for the report. Good to hear that it is working now.