hi .I am new to this so not sure if this is correct ,so please bear with me.
I am in need of help from anyone out there.I have a sony PRS-505 e reader which i bought when they 1st came out a few years ago.I love my e reader,but i have just bought a Mac and I tried downloading from one of the sites i normally used when I had Windows only to find out i could not transfer over to my e reader,after trying with ADE could not download.So i downloaded sony library which does work.But is really annoying.So now I have ADE and sony library installed,Do i need something called calibre instead or as well as.
Any one know the answer.
Also i have been looking at buying the kindle3G but unsure as i ask on the site i normal buy my downloads from and said it not compatible with there book downloads.Any one know if this is true.
Also i wanted to know if i can copy/transfer over my e books from sony to kindle as i have ask a few people on different site either they do not know or they say no .I have to buy them again .I am really annoyed over this as i have already bought them and have re downloaded them a few times since i have my new laptop with no charge.Is the answer I need a certain product to transfer them over from each book if so what software do i need.
Please

one frustrated person.Thank you