To import iPhone pictures to Photos on macOS, follow the steps below:
1. Launch Photos app on macOS and connect your iPhone to MacBook, iMac, etc. via USB cable.
2. Tap 'Trust this Computer' on your iPhone when you receive a message.
3. Select photo items you wanna import to Photos for Mac. Or just choose 'Import All New Items'.
4. Pull your iPhone out of your Mac after the whole process is done.

Google Photos On Mac
Best Photo Storage Options For Mac
Photos App For Mac

Google Photos On Mac

Just go to the Mac App Store to learn about and download each extension. To start a project, simply select photos, an album, a memory, or even an existing project, and then choose the extension you want to use. Download third-party extensions from the Mac App Store. All your photos on all your devices. ICloud Photos gives you access to your entire Mac photo and video library from all your devices. If you shoot a snapshot, slo-mo, or selfie on your iPhone, it’s automatically added to iCloud Photos — so it appears on your Mac, iOS. The somewhat limited user-friendly Mac photo editor, depending on the user’s skill level, when used with the appropriate software extensions, can become a far more powerful and effective package than one could ever imagine. There’s indeed a whole lot more that one can get done on Photos for Mac.

Note: if this is the first time for you to connect iPhone to Mac Photos app, please don't undo 'Open Photos for this device' option at the top menu. If you accidently undo this option, please disconnect your iPhone to Mac, shut down and reboot your iPhone. Then re-connect iPhone to Mac Photos app to import pictures again.

Best Photo Storage Options For Mac

Photos App For Mac

To export pictures from Photos app to Mac, do as following:
1. Choose the pictures you plan to export to macOS.
2. Click 'File' on the top toolbar of your MacBook/iMac > Tap 'Export' > Tick 'Export XX Photos'.
3. Select export image format (JPEG, TIFF, PNG), Info and File Naming > Click 'Export' button.
4. Open 'Finder' on MacBook, Mac Mini, iMac desktop to search and find the pictures you export.

Photo Options For Mac