A:AnswerNot necessarily. A "new PC" with Windows 7 (unless you selected the downgrade) doesn't sound new at all. In other words, the PC itself may be new but lack the latest technology. Your hard drive and motherboard can also create a bottleneck. Check these things out with whoever / wherever you bought your PC to be certain.
If you can, try it on a USB-C port or newer PC and see if it's still slow.
A:AnswerI know this will sound odd, but i do not use fingerprint ID on any kind of electronics PERIOD, that includes the fingerprint ID on my laptop. Password only.
A:AnswerI used it to clone my internal hard drive on my Mac Mini 2012 and use it as a boot disk so it should work for 2019 iMac as the process should be the same.