Sounds as though you don’t presently shoot in RAW …
I cannot recommend a RAW workflow highly enough—it can turn a so-so snapshot into a useable and high-quality picture. Major benefits include shadow and highlight recovery, often useful in very high-contrast situations.
I use Capture One on a Macbook Air 13" (1.35Kg) when out and about, and find its performance surprisingly good with C1 (SSD assists greatly in this).
Capture One is available for MacOS and Windows, as is its main competitor, Lightroom.