I have Affinity Photo. It is excellent and can handle RAW files. They often have half price sales, if you keep tabs on their website/get on their mailing list, and they offer a free trial.

iMac (19,1, 3.1 GHz i5, 12.7.4, 40 Gb RAM); MacBook Air (1.8 Ghz, 8 Gb RAM, 10.14.6, 256 Gb SSD) Vodafone router and Devolo Wi-Fi Extender, Canon TS8351 printer/scanner.