The problem is not with Poser. It is with Apple's OS. This "bug" is not limited to SM software. Many other companies are having similar responses to similar complaints. Bug Apple for a fix. I wish you luck. The OS is trying to limit writes and reorganization so as to extend the life of solid state drives which currently do not survive the massive number of rewrites to the media that older spinner drives do. Software now has to do what the OS used to do. Software companies around the planet have to rewrite for Apple products yet again. It is not a simple "bug fix"