Depends on the output of the VHS player. Mine has analog (to the analog cable or antenna input of the TV, channel 36) and SCART (to the SCART on the TV). Most likely your Mac (unless it has an analog TV card) has none of the two.
And even if your player has HDMI out, it's unlikely your Mac has HDMI in.

So the best thing would be to buy or rent or borrow a DVD recorder like found on http://www.ebay.com/bhp/vhs-to-dvd-recorder, with the right input for your player.

If you look around, you'll find many shops, companies, persons or freelancers that will do it for you, just like they convert even older super-8 movies to DVD. But for a dozen I think that DIY with the right hardware is much cheaper.