We suspect your Vine is Chasselas Musque, which is very subject to crack. Cut the shoots half through, a little below the bunch, whenever the first berry cracks, and protect the roots from heavy rains. This will prevent so much sap being sent into the bunches, and you will find it stop the cracking. If your Figs are planted out and growing strongly in a rich border, they will not bear; root-prune them, and give them light soil and lime-rubbish to grow in, and if they are the ordinary sorts they will bear.