Thanks for all your replies. Much appreciated. I went to the Toyota dealer yesterday and they seem to think that it may need a new USB port. I borrowed an adapter which they programmed into FM and all the USB's played everything that my Mac says is on there on there rather than a random selection of a few songs (max 12 - some only 2 on different USB's) When it is switched on with this FM adapter in place, the voice tells me it is connected to Bluetooth so I guess this is some kind of bluetooth converter. They also lent me an adapter for my shuttle but that still doesn't work even though it's the correct adapter and this doesn't play through the other adapter either
. I do use iTunes for the shuttle and, having checked, they are all listed as being on MP3? Unfortunately, I don't have windows and have no idea how to 'rip' CD's or how to 'convert' . I'm totally lost with computers I'm afraid being 70 yrs old - my late husband used to do all this sort of thing for me - I don't have (or even desire) a smart phone which apparently would make it a lot easier..? I've even asked Toyota if they will install a CD player for me lol!! But, alas, they say this is not possible in the Aygo I have Grr! . I am returning the adapters today so hopefully they will be able to solve the mystery. Thank you for all your help and I will let you know how I go on - Brenda