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John.B

macrumors 601
Original poster
Jan 15, 2008
4,200
711
Holocene Epoch
iTunes 12.5.1 won't install on OSX Yosemite 10.10.5.

Current iTunes version is 12.3.2.35, install appears to proceed from via App Store app but then reverts back and shows 12.5.1 to be installed, as 1 Update Available. All other updates in place (Security Update 2016-005, Safari 10.0, etc.).

Oddly, each individual install attempt shows repeatedly under the Updates Installed in the Last 30 Days section.

Obviously, iOS 10.0.1 won't install without iTunes 12.5.1...
 
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