What size UPS for a 27" iMac?

What size UPS should I get for a 2012 27" iMac?

http://images.apple.com/environment/reports/docs/imac_27inch_oct2012.pdf
Almost any UPS will be suitable. I have the APC Back-UPS 750 which comfortably provides 35 to 40 minutes of operation for my 21" iMac plus its external backup disk drive, so it should meet your requirements.
You do not need to install any software. Just connect APC's supplied USB cable to your Mac. OS X already includes all the USB communication required for a UPS.
Consider Cyberpower UPSs also. I do not have one of theirs but they appear to be worthy competitors for APC. Don't be too concerned about "pure sine wave" products for computer equipment - it's unnecessary.

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    http://images.apple.com/environment/reports/docs/imac_27inch_oct2012.pdf
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    Please see their answer regarding my question :
    Thank you for contacting APC’s Customer Care Team. We are here to ensure that your query is resolved as quickly as possible. Please find our response to your query below.
    Dear Mr. Z,
    Thank you for contacting APC.
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    http://www.apcmedia.com/salestools/JNOE-7GSAQJ/JNOE-7GSAQJ_R11_EN.pdf
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    http://www.apc.com/resource/include/techspec_index.cfm?base_sku=ap9631
    Please let me know if I can assist with any further info.
    Kind regards
    <Personal Information Edited by Host>

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