Installation failed: Can't install the software

I have an iPhone 7+ which is running iOS 11.4.1

I have a MacBook Pro (Late 2013) running High Sierra 10.13.6

iTunes is version 12.8

I am receiving the same error message as well as the notification the software is not available on server.

I have the same problem. iPhone 6S, iOS 11.4.1 and IMac with OS10.13.6.

Occasionally, iTunes on the iMac will recognize my iPhone, and sync with it. But it never gives me the option to add photos or to add tunes, albums or playlists from iTunes.

In contrast, Photos has no problem recognizing my iPhone and downloading photos from it. this makes me think it is a problem with iTunes software.

I have the same problem. iOS is updated, itunes is updated, my phone jack is clean and charging via USB works if it's plugged into the wall or if I switch operating systems (e.g. to linux). This appears to be a mac problem and the prompt saying to download software, then failing to do so, only makes it more frustrating.

No serious solution that I’ve seen. For me, even though I got past this hurdle, I hit a second one. My intent was to backup my iPhone to iTunes, then restore to the new phone. Even though using the old cable allowed me to back up, no cable new or old let me restore (said it ran out of memory on the phone, which was not true). I ended up restoring from an iCloud backup, which worked. iTunes is a disaster.

Seems I'd simply got my new iPad cable with my with my original iphone cable. When i swopped them back all error messages disappeared and my iPhone updated normally. Seems a bit unnecessary if you ask me!

Exact same issue here. Very frustrated because I have a brand new XS max with the latest software (did an update right out of the box — IOS 12.1.2) and updated to Mojave 10.14.2 the very same night and it still won’t recognize my phone! Read some other comments about changing to an Original Apple Lightening cable (I was using a longer after-market one) and it immediately recognized my phone and started backing up! Who would’ve thought something that simple could be the fix. I was about to lug my IMac to the nearest store 40 miles away. Thanks everyone!

I get the following when I try to connect my iphone x 11.4.1 to my mac 10.13.6

Did you update iTunes to the latest version?

I've got the exact same problem as described by the OP.

My iTunes and Mac are both up to date.

Everybody has the same issue but has anyone found a solution??

My time and date settings were correct. The problem turned out to be a failing USB cable. With the cable replaced, everything is working now.

For me using a USB hub helped, with the same lightening cable. It seems the port in my MBP is a bit wonky.

This worked for me too. Just switched USB ports.

What "new software" is this, exactly? How and where are you getting "prompted" to install?

Be specific. With just what you told us, it is unclear whether you are talking about legitimate updates or some scam that is luring you to install adware or other dody software.