Install W8.1 on iMac 21.5 Late-2013 failed

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OlivierCesar Author

Level 1

0 points

Install W8.1 on iMac 21.5 Late-2013 failed

I did try everything to get it work but no success.

Started bootcamp and partitionned 200GB on my Fusion Drive.

Bootcamp created my USB with a W8.1 Pro and the drivers.

I replaced the driver with BootCamp5.1.5640 as my mac was listed to use this drivers in this KB.

Boot Camp Support Software 5.1.5621

No can do, I always get the same error when Windows try to install

Anyone an idea why it doesn't work as it should be?

iMac (21.5-inch, Late 2013), OS X Yosemite (10.10.3), null

Posted on May 2, 2015 3:16 PM

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Answer 1

Loner T

Level 9

59,471 points

May 2, 2015 4:54 PM in response to OlivierCesar

1. There is no reason to replace the drivers on a USB created by BC Assistant? Please read both links carefully.

2. From System requirements to install Windows on your Mac via Boot Camp - Apple Support, your iMac needs

Boot Camp Support Software 5.1.5640 which has

Post Date: Feb 11, 2014

File Size: 925.6 MB

System Requirements

MacBook Air (11-inch & 13-inch, Mid 2013)
MacBook Pro (Retina, 13-inch & 15-inch, Late 2013)
Mac Pro (Late 2013)
iMac (21.5-inch & 27-inch, Late 2013)
Windows 7, Windows 8, and Windows 8.1, 64 bit

As noted in Boot Camp Support Software 5.1.5621, it does not support your iMac.

Post Date: Feb 11, 2014

File Size: 924.9 MB

System Requirements

MacBook Air (11-inch & 13-inch, Mid 2011)
MacBook Air (11-inch & 13-inch, Mid 2012)
MacBook Pro (15-inch & 17-inch, Mid 2010)
MacBook Pro (13-inch, & 15-inch, Early 2011)
MacBook Pro (17-inch, Early 2011)
MacBook Pro (13-inch,15-inch & 17-inch Late 2011)
MacBook Pro (13-inch & 15-inch, Mid 2012)
MacBook Pro (Retina, Mid 2012)
MacBook Pro (Retina, 13-inch, Late 2012)
MacBook Pro (Retina, 13-inch and 15-inch, Early 2013)
Mac Pro (Early 2009)
Mac Pro (Mid 2010)
Mac Pro (Mid 2012)
Mac mini (Mid 2011)
Mac mini (Late 2012)
iMac (27-inch, Mid 2010)
iMac (21.5-inch & 27-inch, Mid 2011)
iMac (21.5-inch & 27-inch, Late 2012)
iMac (21.5-inch) Early 2013
Windows 7, Windows 8, and Windows 8.1, 64 bit

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Answer 2

OlivierCesar Author

Level 1

0 points

May 2, 2015 11:48 PM in response to Loner T

That's OK. I will not change the drivers when creating the usb via BCA.

But it doesn't answer my question:

How can I install W8.1 on that iMac!

It user to work without any problem on my mid-2011

In fact this is a new iMac (got it last thursday)

Or If could install at least W7, I would already be happy.

But this one doesn't work either.

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Answer 3

OlivierCesar Author

Level 1

0 points

May 3, 2015 4:04 AM in response to OlivierCesar

OK! Got it working.. finally!

Main problem is that I wasn't seeing my fusion drive but I was seeing the SSD AND the Mechanical Drive!

I deleted the partition I created before via Disk Utility, rebooted, started BCA.

Did a new USB with default drivers, partitioned again, downloaded the 5640 and started installation.

Once restarted I could only see my Fusion drive AND the BOOTCAMP partition.

Installed correctly now.

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