I am about to create a Windows 10 install on a SATA internal SSD drive in my Mac Pro 2010 5,1 with 144.0.0.0.0 firmware.
Been running Windows 7 on a regular HD for years for games, but now they all want W10 or at least have removed support for W7.
I have read hereabouts that it is not advisable to attempt W10 install via USB stick as it can create corruption, and the advice was to seek the last available W10 installer that fits on a dual density DVD disk.
Can anyone with a similar setup confirm or deny this rumour? And if you have any other tips let me know?
Thanks.
In this situation, it should be pretty straightforward, though some things might have changed since I last did this. Just download the latest Windows 10 ISO from Microsoft, burn it to a DVD, and boot from the disc. The installer will launch in Legacy BIOS mode (I have seen the installer take up to 20 minutes to start, so be patient) and you can run through the install process. As you said, do not use a USB Windows 10 installer as it can brick your Mac. This has happened to a number of people on this forum, unfortunately.
Installing the Boot Camp drivers on Windows 10 takes some extra steps because the Boot Camp installer refuses to run on Windows 10, but you can get around this easily by manually running each installer from within each subfolder of the Boot Camp driver package.
However, since you already have a functioning Windows 7 install and I presume you might just do an upgrade installation, you might have no need to install Boot Camp drivers. Run through the install, run Windows Update to install any system updates and optional driver updates, and then check Device Manager to see if you need any specific drivers from the Boot Camp driver package.
If you need a functioning Boot Camp control panel in Windows (which allows for easy switching between Windows and macOS as the default boot option), you should be able to accomplish this by installing the Boot Camp package designed for the iMac Pro. You can download this using the Brigadier utility. Try the following instructions, which might be a bit out of date (start at step 9; you do not need to worry about creating partitions because you already have them set up for Windows 7):
[Update 29 Feb 2020: Members reported that this procedure will install Boot Camp 6.1.9 now, which apparently only allow users boot to the latest macOS drive. For those who has multiple macOS drive. This method doesn't work anymore. Also, latest Windows 10 (1909) seems also not allow Bootcamp 5...
forums.macrumors.com
If you do not need a Boot Camp control panel to switch between Windows and macOS, then I recommend not bothering with this.
Let us know how it goes.