How hard is to answer this? Ten people say ten different things?
Or recommend a slim low profile kbd, no 10-keys needed, for Mac or PC don't matter, must be backlit, NON-MECHANICAL, ideally wired USB but I will live with wireless if no choice.
Logitech offers lots of keyboards with backlit keys. Some wired, some wireless. If you want one with Mac keys, your options are more limited. For example, I have a Logitech K811 Bluetooth keyboard I use with my Mac that is backlit.