Yes, Apple dropped Aperture years ago. I'm using DigiKam for organization and simple edits like crops and adjustments. It is free and open source and does much of what Aperture did
Learn about digiKam
www.digikam.org
For more complex adjustments to RAW files Dark Table goes a little farther than Aperture ever did. it is also free and open source
darktable is an open source photography workflow application and raw developer
www.darktable.org
You can use both and don't have to choose, they can work together.
What Apple taught us with Aperture is that if you depend on Apple software, you always need to have an exit strategy because they can drop a product at any time. Apple's core product is iPhones and now EVERY other product line is secondary and could be dropped.