Stop struggling with Lightroom! There's no need to spend hours hunting for the answers to your Lightroom Classic questions. All the information you need is in 
Kirby Krieger
Active Member
- Joined
- Mar 12, 2017
- Messages
- 148
- Lightroom Experience
- Intermediate
- Lightroom Version
- Classic
- Lightroom Version Number
- LR Classic CC 7.5, Camera RAW 10.5, all up-to-date via Creative Cloud 4.7.0.400
- Operating System
- macOS 10.13 High Sierra
I have been bit by this gremlin. Searching this forum and the Web turned up others with identical and similar problems. No-one has found a solution. Help please.
When I play a slideshow I get the following error message: "Dynamic Link Media Server failed to launch / Slideshow playback is not possible due to an error. Please try relaunching the app. If the problem persists, you may want to re-install Lightroom."
Sometimes closing Lightroom and re-opening it allows me to play slideshows.
Sometimes I have to re-start.
Sometimes I need to shut the computer down and restart.
Today, nothing works to restore my ability to play slideshows.
I have tried all options at "Preferences ▹ Performance ▹ Video Cache Settings", viz. "limit/no-limit", different sizes, purged cache repeatedly. I have rebooted after changing any setting.
What do I risk losing if I unstall/re-install via the CC app? (Others report that this did not resolve the issue.)
—Kirby.
OS 10.13.6
LR Classic CC 7.5, Camera RAW 10.5, all up-to-date via Creative Cloud 4.7.0.400
iMac (Retina 5K, 27-inch, 2017), 4.2 GHz Intel Core i7, 32 GB 2400 MHz DDR4
3 monitors: iMac, LG 27" Ultrafine, NEC PA271W
When I play a slideshow I get the following error message: "Dynamic Link Media Server failed to launch / Slideshow playback is not possible due to an error. Please try relaunching the app. If the problem persists, you may want to re-install Lightroom."
Sometimes closing Lightroom and re-opening it allows me to play slideshows.
Sometimes I have to re-start.
Sometimes I need to shut the computer down and restart.
Today, nothing works to restore my ability to play slideshows.
I have tried all options at "Preferences ▹ Performance ▹ Video Cache Settings", viz. "limit/no-limit", different sizes, purged cache repeatedly. I have rebooted after changing any setting.
What do I risk losing if I unstall/re-install via the CC app? (Others report that this did not resolve the issue.)
—Kirby.
OS 10.13.6
LR Classic CC 7.5, Camera RAW 10.5, all up-to-date via Creative Cloud 4.7.0.400
iMac (Retina 5K, 27-inch, 2017), 4.2 GHz Intel Core i7, 32 GB 2400 MHz DDR4
3 monitors: iMac, LG 27" Ultrafine, NEC PA271W