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GhostlyGhoster

macrumors newbie
Original poster
Apr 3, 2019
3
0
Mafia City
I am wondering if I can take another PC and use the hard drive in my Mac pro 1,1 and install Windows 10 that way. I will install it to the hard drive with another PC, then boot it on my Mac pro 1,1. Will this work?


My Mac pro 1,1 Specs:


1tb Western Digital drive

32GB Ram (24GB usuable)

EVGA 8400GS 1GB (gonna use OEM 7300GT for boot screen)

The original Xeons (not flashed to 2,1)
 

Alex Sanders74

macrumors 6502
Nov 26, 2013
275
64
Toronto, Canada
If it's a UEFI install, that's never a good thing. Windows needs to be installed in legacy mode as the Pros never had UEFI. There are boot ROM issues doing this. Not sure if the 1.1 MacPro was affected by this issue, but one of the wizards on this forum can likely advise. I would start from scratch, installing Windows off a DVD on the Mac to a separate drive from OS X.
 
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GhostlyGhoster

macrumors newbie
Original poster
Apr 3, 2019
3
0
Mafia City
If it's a UEFI install, that's never a good thing. Windows needs to be installed in legacy mode as the Pros never had UEFI. There are boot ROM issues doing this. Not sure if the 1.1 MacPro was affected by this issue, but one of the wizards on this forum can likely advise. I would start from scratch, installing Windows off a DVD on the Mac to a separate drive from OS X.

It's going to be a legacy bios install. It will take longer to boot, but if it works, I'm happy. My PC only has Legacy bios.
 
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Soba

macrumors 6502
May 28, 2003
301
335
Rochester, NY
It's going to be a legacy bios install. It will take longer to boot, but if it works, I'm happy. My PC only has Legacy bios.

To reiterate, it's not a good idea to install on one system and then move the drive to another system. It is possible to do this under some circumstances, but you will run into problems independent of the BIOS/UEFI issue.

I am curious why you want to install on a PC and then move the drive to the Mac. Why not install Windows natively on the Mac on a separate hard drive? This should work the same as in any PC.
 
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GhostlyGhoster

macrumors newbie
Original poster
Apr 3, 2019
3
0
Mafia City
To reiterate, it's not a good idea to install on one system and then move the drive to another system. It is possible to do this under some circumstances, but you will run into problems independent of the BIOS/UEFI issue.

I am curious why you want to install on a PC and then move the drive to the Mac. Why not install Windows natively on the Mac on a separate hard drive? This should work the same as in any PC.


I don't have a DVD to burn. Both my PCS have DVD burners, but I don't have any DVDs. I am going to probably try this over the weeknd and report back.
 
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Nguyen Duc Hieu

macrumors 6502a
Jul 5, 2020
884
206
Ho Chi Minh City, Vietnam
My Mac Pro:

Mac Pro 1,1 (flashed to 2,1)
8x 2GB FB-DIMM PC5300
VGA1: 7300GT 256MB
VGA2: Radeon HD 6670 2GB
HDD1: OS X 10.7.5 (Lion)
HDD2: OS X El Capitan (restored with a disk image made by Greg Hrutkay)

Last week, while running El Capitan on HDD2, I tried to
- partition HDD 1 to make a Bootcamp Windows partition,
- downloaded a Windows 7 (64bit) ISO file and build a USB installer within OS X
- Click install and the machine rebooted.
... to a black screen...
I turn off the MP
I removed the Radeon HD 6670, and insert the 7300GT back in, then reboot with Win USB installer, HDD 1 and HDD 2 all plugged in.
... grey screen of Mac, then switched to black screen, this time with a small flashing dash on top left of the screen.

I removed one by one (USB, HDD), still same black screen with a flashing dash

I then removed all USB and HDD, now the MP show the "normal" grey screen with a questionmarked folder icon (typical when MP found no bootable device)

I then tried to insert an SSD running Windows 10 which I removed from another PC.
I installed Windows 10 under the form Windows To Go (using Rufus and 1803 Windows ISO file) before (in legacy & UEFI mode), it had been running rather well but failed to update to any newer version of windows 10.

the SS booted straight into windows 10, with some VGA drive missing only. I could access Internet from there.

But not knowing what to do next, which Boot Camp Assistant to install, I turn-off MP, took out the SSD, and sent the machine to a service shop where they would help me re-install OS X Lion.

I will retry installing OS X El Capitan and Windows 10 Boot Camp (using Rufus method), will report the result here.

What I plan to do is:
- Install OS X El Capitan (restore from disk image method) on MP
- Remove the HDD with OS X Lion
- Install Windows 10 to a separate HDD on my PC. (Rufus to a USB box)
- Insert that HDD back to Mac and install Boot Camp + driver on it.

Anything I need to prepare or be reminded of?

Thank you,
Note: the DVD on my MP is not working. I don't have another DVD-RW IDE/ATAPI lying around to replace it. So installing by DVD is not feasible.
[automerge]1594113091[/automerge]
Why do I need to run Windows on my Mac Pro?

I just want to flash the Radeon R9 280x which I plan to buy.
My other PC is an HP SFF and I can not attach any big size VGA card to flash. No PSU support, either.
 
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