Not only did it use a windows model that did not play well with other Mac apps, it was even darker & lower contrast than the Affinity one & had no options to customize anything. Just as annoying, their proprietary uninstallers for the older versions would either not run at all on the newer OS version or would not remove a lot of the older files that were no longer needed or usable with the newer OS version. I don't know what the more recent versions are like but the old ones were not very Mac friendly: they installed tons of support files on the startup drive, including around 2.3 GB of junk in Library/Applications Support, much of it necessary because Adobe used its own proprietary code for many things instead of the API's provided by OS X (which is probably why they broke when I updated the OS). It does run on El Capitan, but it crashes every time I quit it, generating a lengthy crash report, & some of its functions no longer seem to work reliably.
PSE used to be one of the apps I always had installed on my iMac, but I got tired of having to pay for an upgrade for it every few times I upgraded OS X because the older version would not run on the newer version of OS X.
