Hi, I have a late 2013 rMBP with a core i7 4mb ram. I use it for Logic Pro and GarageBand BUT it only has a 128gb hard drive and 4mb ram which I want to upgrade. Even the refurbished rMBP 2015 at 512 HD and 8gb ram is $1800 Canadian, but I was able to find a MacBook on the refurbished store for $1400 with 512 HD and 8 gb ram. Figure I could sell my 2013 rMBP for $1000 and then that would make it a $400 upgrade...http://www.apple.com/ca/shop/produc...nch-macbook-12ghz-dual-core-intel-core-m-gold I know the 2015 core m is slower than a 2013 i7 but how much really? I usually only have maybe at most 8 tracks, but I'm thinking about experimenting with electronic music down the road (native instruments synths etc). The only reason I'm getting another laptop for music production is because I also need a laptop for school. Otherwise I probably would just get an iMac. So do you think the MacBook is capably of doing GarageBand/logic stuff? Thanks for your help, I always appreciate it.