Problem syncing music to iPhone through finder

When I attempt to connect my iPhone 8 to my Mac air it keeps flashing and off in Finder, and on the Mac screen flashing 'trust this iPhone ' but it won't stay on the screen long enough for me to click on trust.

Been trying all day, I've tried several things from the Apple help pages, but nothing has worked. Any help would be appreciated. Thank you

Hello termite,

Thank you for using Apple Support Communities! I understand that specific albums will not sync from your Mac to your iPhone using iTunes. I would be happy to help point you towards a resolution.

To start, could you tell us more about how the music was added to your Mac? Was it purchased from iTunes, imported from a CD, or did it come from another source? I would also like to have you check to see if any of the symbols or status icons shown in the resources below appear next to the albums that won't sync:

• Identify cloud status icons in your music library on your Mac or PC - Apple Support
• Symbols used in iTunes on Mac - Apple Support

To help further isolate potential causes, you may also want to turn off automatic syncing for all content types except Music in iTunes. Select "Manually manage music, movies, and TV shows" under the Options section on the General tab:

Change how syncing works on Mac - Apple Support

Manually sync your iPhone with iTunes again, this time selecting only one of the songs or albums you're experiencing an issue with. Keep us posted on the results:

Use iTunes to sync your iPhone, iPad, or iPod with your computer - Apple Support

Cheers!

I also have this problem. When I attempt to connect my iPhone 8 to my Mac air it keeps flashing and off in Finder, and on the Mac screen flashing 'trust this iPhone ' but it won't stay on the screen long enough for me to click on trust.

Been trying all day, I've tried several things from the Apple help pages, but nothing has worked. Any help would be appreciated. Thank you