Never used a Mac in my life so I have no idea on that bro. As far as changing your IP address I think it has more to do with your ISP than your hardware you are using. If you have a static IP, changing it is always a bit harder without the use of a VPN or proxies. It can be done (in Windows) by tweaking/spoofing your MAC address and hostname but it's not alot of fun to do. I get asked what VPS provider I use all the time and I always reply the same thing. So here it is again... Right now I'm keeping the VPS providers that I use private, sorry. But I will give you some clues. Look for VPS providers in Turkey, Russia, Estonia, Macedonia and China. Make sure you get a good one too. Don't go with a budget VPS for mailing. A good way to judge how a VPS is going to be on spam complaints is to send them some fake complaints saying you are getting lots of spam emails advertising their services and you are going to turn them in if they don't reply. See if they ever respond to it. The ones that do not respond at all after a while are the ones that you may want to get a VPS from for BH emailing. And in all reality, even while you are trying providers, as long as you can get at least a good week or two out of each one, you should be able to get enough emails out to cover the cost of the VPS itself and make some money from it before they suspend it. It's all part of the game really. Unless you have a big budget to invest right away I would recommend starting off small and keep reinvesting. I started off with one Linux VPS (with 3 IPs), one Windows VPS, a free (cracked) email scraper and 50 private http proxies to use in the scraper. If you are planning on emailing to the big free email providers (yahoo, gmail, aol & hotmail) it is almost essential that you use multiple IPs. They each have a limit on how many emails their systems can receive daily from a single IP. I'm not exactly sure of the numbers but it's around 5k - 10k emails allowed daily per IP. If you parse out those emails, it's not as important to use multiple IPs however you will have to check the IP alot to find out when it gets blacklisted. IEM normally uses an SMTP IP rather than proxies to mail through.You may be able to get it customized to use proxies but it would cost and proxies are often already blacklisted for mailing. Huh? Lol... This is where I will encourage you and everyone else to do some good old trial and error learning on their own. I try to answer the questions to the best of my ability and I think I've done a pretty good job of making things as simple as possible for all the new people out there wanting to try their hand at emailing. However, everyone's setup is going to be a bit different and some things are just going to have to left up toy your own devices when it comes to learning the basics of your own emailing setup. You will probably have to use proxies when scraping. Google has limits on how many searches per day a single IP can do. After the limit has been reached, it starts asking for a captcha to be entered in order to do another search. May want to get some proxies for scraping. I have to use them too, don't worry. As far as using multiple IP's with IEM, I paid someone on Freelancer.com to customize my IEM to rotate through different SMTP accounts. Then it's just a matter of configuring each VPS with 10 accounts & domains each on their own IP. Cost me about $500 bucks but was worth it's weight in gold.