Slideshow will not run

[wellsj46764092]

Hello,   I am using LR Classic 11.3.1 on a 16" macbook pro. I have a collection of 477 photos (some RAW, some tiff and some jpeg). If i select about 150 and hit Play LR shows a stau bar and says something like "preparing" and eventually the slideshow will usually run. If I select all 477 photos LR "prepares" and the status bar moves along and when it gets to photo477 I get a spinning ball for several minutes and then the status bar disappears and nothing happens. I eventually hit play and the entire process starts over. 

I would love any advice. Thanks.

[TheDigitalDog]

Try resetting your Lightroom preferences:
https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html

Quit Lightroom Classic.
MacOS: Press and hold the Shift + Option keys.
Windows: Press and hold the Shift + Alt keys.
While holding down the keys, launch Lightroom Classic.
When asked, select "Yes". 

[wellsj46764092 · Accepted solution]

Many thanks. I thought that I had done that previously but I clearly did not do something right. Worked like a charm.