artie, When I bought this imac (2009) it had 7.1.5 and slideshow worked. I don't remember when but one time after opening iphoto, a window appeared saying that an update was available and of course I figured it must be an improvement so I updated. I tried to revert back to 7.1.5 but couldn't. It isn't critical and besides, how would Yosemite work/or not with some of my other software...more money I suspect. One thing I have noticed on various forums is that no one to my knowledge, has slideshow working with 8.1.2 Is there actually a solution?
BTW, I did trash iphoto and download it again but to no avail. I can live with it I suppose. Thanks for all your suggestions...appreciated. jaybass
OS 13.6.6 iMac (Retina 5K, 27", 2017, 3.4 GHz Intel Core i5, 24 GB RAM, 2400 MHz DDR4. SuperDuper. 1 TB Lacie HD
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