best to my knowledge, miniDV camcorders are 'hardwired' to one standard.
means: for PAL-tapes you need a PAL-camera, for NTSC-tapes a corresponding cam.
For sure, your Mac/iMovie accept any standards...
miniDV is a 'dying' format, you should get used cameras for lil' money, although it is recommended to use for playback the cam you used for recording.. but if this isn't optional...
And, no, there's no 'label' outside a tape indicating what format was used.
There were rare devices claiming to playback both standards, but those create a non-standard signal which in 99% cases create issues on import...
search eBay for some <50$ devices, optics can be broken, you just need 'player'-functionality.... 😉