I was asked to setup a laptop for a local food bank and while the laptop was a good idea to setup some concerns arose about how to secure the device and whether a newer laptop was the best choice based on the needs for the food bank which is a large screen, windows 10, and microsoft office. Now given the requirements there were a couple older iMacs around that I had upgraded with solid state drives. We had a early 2008 iMac with 4 gigs of ram and an early 2009 iMac with 8 gigs of ram. The clients for this project originally requested laptops for the space. However since none were available and given the nature of the use case (web surfing and documents) I thought it would be a good idea to use a older iMacs that were available.
You will then get the following screen and it will download and format the flash drive with the windows drivers for your version of the mac.
Make the selection of the disk as shown below. The disk will have to be formatted as a FAT32 (MBR) disk for the Bootcamp tools.
Every Windows bootable disk, xp, vista, 7 would not boot, it would show in selection menu but would give no bootable devices found error.
With the 2008 iMac, once I got Windows 7 loaded and activated the key, I loaded chrome, then downloaded and ran the Windows 10 upgrade.
Once I was done with the install wizard, everything went just great, and we eventually got to our Windows 10 Desktop.