Installation failed: Can't install the software

This resolved the issue

Reset NVRAM or PRAM on your Mac - Apple Support

Using a new lightning cable solved it for me! Even though I was using an official lightning cable before.

Try a different lightning connector, thats what solved this problem for me on Mojave with my iphone XS.

Tried lot's, in the end a new cable (and no update) got it going (MacBook Pro and iPhone X).

OMG, that did it!

I had downloaded Xcode some time ago. I just started it up and it asked to quit iTunes and install some additional software. After doing that, I restarted iTunes and was able to connect with my phone using the same cable that was failing previously.

Thanks for the tip!

I solved this by the most non-intuitive of means. I just restarted my computer and then used the usb cable from the keyboard to connect to my phone instead of the one from the trackpad. Boom. No more bizarro messages like this that would prevent me from syncing anymore.

I just swapped the cable that connects my iPhone 10 to my mac to resolve this issue. I had been using an older cable. I swapped in the cable that came with my iPhone 10 - it does seem a bit thicker; so, it's definitely different.

The cable is very important, and in case of on/off connections with iphones and macs, this was and is the foremost source of trouble. Even switching the USB port can make a difference here (my experience!).

BUT, this issue kept going on with the iphone of my wife, even though I switched through different cables.

Even resetting the iphone did not help.

In the end, the problem settled after I connected the iphone to the mac while being in my account instead of my wife's.

Afterwards also the connection within her own account was fine.

Very strange and very annoying behaviour.

I was having the same problem for months, probably since the last iOS update. I finally had enough and needed a new phone anyway so I got a new phone this morning, got it home, plugged it in to my MacBook...SAME PROBLEM!

After scrolling though here I grabbed the cord from the box for the new phone, and voila, no problems.

Since this problem started after the last iOS update, I suspect this is something built into it to detect off-brand cables. Maybe it Apple's cables didn't fray so easily, we wouldn't need off-brands.

Solution Here (I have fixed the issue)

• If your iMessage is working fine jump to step 4.

1. First check if your FaceTime/iMessage is working. (if its not then probably your account has been temporarily banded) DON'T PANIC !
2. Call Apple Support (Skype Online Free +18002752273) wait them to verify its you (Take around 10-20min voice-voice call, be patience because its the only solution)
3. After unblocked (you will be able to sign in to your FaceTime and iMessage)
4. Now Sign out (iCloud) from your Mac and Phone (other devices) and SignIn Again.
5. Thank me later. Enjoy !

This was my issue too. I was using a new non-Apple lightning cable I bought from a convenience store. When I switched to another non-Apple cable it worked and synced.

SOLUTION:

Use the cable that came with the new iPhone XS. It will not work with any other cable.

Try using a different lightning cable, that's what worked for me.

It works, just uncheck (disable) day of the week and date. For some reason, it works then!

Thanks!

If you're using the Phone for Wifi, try a different cable.