Apple made available System 7.5.3 for free download some years ago (1999?) though they have since stopped hosting the files. https://lowendmac.com/2001/abandonw

Apple made available System 7.5.3 for free download some years ago (1999?) though they have since stopped hosting the files. https://lowendmac.com/2001/abandonware-and-copyright/ https://lowendmac.com/2001/abandonware-and-copyright/