Older Mac minis may not accept KVM input at boot
An older , likely a 2014 7,1, can fail to accept keyboard input from a USB KVM during the boot stage. The KVM works after the has fully started, but it does not control the boot picker. Even a normal boot from the SSD may require pressing Enter or using a mouse, and that becomes a problem when the KVM input is ignored.
Several USB KVM setups for HDMI, DP, DVI, and VGA behave normally with other machines, but this is the difficult one. The issue is not just video output; it is whether the accepts USB input before the loads.
Key points
- A likely 2014 7,1 does not respond to USB KVM keyboard input during boot.
- The same KVM works once the is running.
- Booting from the SSD may still require pressing Enter or using a mouse at the boot picker.
- Multiple USB KVM setups work with other computers but not this .
- owners should keep a direct USB keyboard or another recovery plan available.