Tiny visibility

Struggled to find anything very tiny today.  So here you have some tiny visibility which was the result of about 45 minutes of absolutely torrential rain and hail this afternoon which made motorway driving exceptionally unpleasant!

On a different note, my advisers from yesterdays Blipmeet told me it was about time I got my act together and started learning how to use photoshop.  I always do what they tell me so have been investigating.  So some questions for any of you who feel able to answer:

Some reviews seem to indicate problems downloading it onto Mac.  Anybody any experience in this?

Is a download or a disk a better buy?

Anyone found any good offers anywhere?

Any advice will be gratefully accepted...