Boot Camp functions in Mac OSX Sierra?

I am still in Mac OSX 10.5.5 (Yosimite) because, after attempting to update to Sierra, I lost my Boot Camp Windows 7. I had to recover to 10.5.5, and re-activate my Windows 7 in Boot Camp, with the associated re-loading of all of my applications. Does Sierra or High sierra support Boot Camp?
Appreciatively, Arbyem
Bruce MORRISColonel (Retired)Asked:
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strungCommented:
It should work, but check this Apple KB re compatibility: https://support.apple.com/en-ca/HT204048
Jackie ManIT ManagerCommented:
What is your model of Macbook?
Bruce MORRISColonel (Retired)Author Commented:
MacBook Pro - mid-2012. Arbyem
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Bruce MORRISColonel (Retired)Author Commented:
I did not find any  useful information in the KB article.  My issue is that I never did discover why my system failed to accept Boot Camp when I tried the update to Sierra! I am not prepared to update to High Sierra until I can be assured of a successful use of Boot Camp/Windows 7 Home Premium. I still have FrontPage 2003 and Quicken XG 2007, each of which fulfill my existing requirements provided by these Windowx 7 applications. Perhaps I ought to continue with Yosemite (10.10.5) and ignore all requests to upgrade Mac OS X? Appreciatively, Arbyem
Jackie ManIT ManagerCommented:
You need to uninstall the bootcamp and windows 7. Upgrade to Sierra and install bootcamp software version 5.1.5621 and do a fresh install of Windows 7 afterwards.

https://support.apple.com/kb/DL1720?locale=en_GB

You need to follow the correct sequence and do not format the bootcamp partition in GPT format or the bootcamp will not work.
Bruce MORRISColonel (Retired)Author Commented:
Thanks for the expeditious advice, which could well work!
However, I do not consider that the relative benefits from the latest Mac OS X update will offset the tremendous difficulty if pursuing the  process you have described. I am willing to accept the somewhat degraded performance under Yosemite, while continuing to achieve the effectiveness of my two critical Windows 7 applications (FrontPage 2003 and Quicken XG 2007.
Accordingly, I will arrange to close this post.
Appreciatively, Arbyem
serialbandCommented:
The newest OS X does not create an external bootable USB and just boots/installs from the ISO.  You will also need to install Windows 10 as Windows 7 is no longer supported in Bootcamp since at least El Capitan.

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Bruce MORRISColonel (Retired)Author Commented:
Thanks for the further edification. BTW, I erred in my original post; it was my attempt to upgrade to El Capitan when the disasterous failure occurred.
My decision to remain as is looks better than ever! I will dutifully close this post, with thanks to all who contributed. Appreciatively, Arbyem
Bruce MORRISColonel (Retired)Author Commented:
Thanks to all for the relevant recommendations. As I noted in my last comment, I will "struggle" along with my existing configuration of Yosemite (OS 10.5.5), and Windows 7 under Boot Camp - at least until my Win 7 critical applications (FrontPage 2003 and Quicken XG 2007) cease to operate!
My apologies for some of my careless incorrect information provided in some of my comments (my advancing age - 79 - is showing increasingly).  
Appreciatively, Arbyem
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