Yes, you can duplicate your bootcamp application and change it around to let you install Windows 10 directly, but thats not what this guide is for because that can cause a whole slew of other problems when it comes to drivers. Okay, the first step to installing Windows 10 on your old Mac is to actually use bootcamp to install Windows 7 first. If you want to see what it looks like, I have my post here: This guide should work for almost every Mac out there that cannot directly install Windows 10 in Bootcamp. Note: This only works on Intel based Macsīy popular demand, here is a guide on how to install Windows 10 on a Late 2006 iMac (or old Macs in general).