For those projects that require that you use Photoshop or another specialized imaging application, you can summon the Edit With command in Photos for macOS High Sierra.
By doing so, you can continue to use Photos as your organizing library, but take advantage of the extensive toolset in Photoshop. The trick is to apply Edit With outside of the normal editing mode in Photos. Here's a video that walks you through all of the steps.
In my testing, Edit With worked great with Photoshop. But performance varied with other applications. So some trial and error will be required. But when everything falls into line, this adds helpful roundtripping to your Photos app. And sometimes that's just what you need.
New Photos for macOS High Sierra Training!
Is it time for you to learn the ins and outs of the latest version of Photos? Take a look at Photos for macOS High Sierra Essential Training on LinkedIn Learning, or on lynda.com. Maximize your iPhone photography and complement the work you do with your mirrorless cameras as well. You'll love your cameras even more...
You can share your thoughts at the TDS Facebook page, where I'll post this story for discussion.