Q: iPhone will not back up

If you can't make an iTunes backup of your iPhone, iPad, or iPod touch - Apple Support

Are you using the current version of iTunes (12.3.2)?  You should be.  This version requires a reasonably current operating system on your computer.

If iTunes doesn't recognize your iPhone, iPad, or iPod - Apple Support

This is the first time I can truly say that I am extremely angry with Apple after 30 years of owning only Apple products from a 2 Plus up to my brand new iPhone 6s. Becuse I use a Mac that can only run 10.7.5, I cannot sync my phone with my computer. According to Apple support I need to buy a new computer because iTunes 12.2.2 is not new enough to sync with the phone. However the tech told me that I would be able to use almost any windows computer to do the job. HOW SAD IS THAT????? Aplle has to start supporting people who own slightly older computers, especially if they continuously buy new devices. I have owned more than a dozen Apple products over the years. This incident may cause me to chose a PC when I'm in the market again.

IKH wrote:

 

... Becuse I use a Mac that can only run 10.7.5 ...

This is not a Mac that was just built two or three years ago.

The current version of iTunes requires OS X 10.8.5 (Mountain Lion) or newer.  Mountain Lion was released in 2012, so your Mac must be considerably older than that.

Yes, technology marches on.

"The last" I assume refers to my latest post which was a response to IKH and pretty much off topic for our conversation.

But assuming you have a new Mac that has never really communicated to your iPhone before, then:

• Have you successfully migrated your iTunes library to your new computer?
• Are you logged in to iTunes (Store > View Account from iTunes' menu)?
• Is your iPhone associated with this Apple ID (Store > View Account > Manage Devices)?

Sorry for the mispost. Just airing out my frustration with apple