Please confirm you're running Lightroom CC 2015.1 or later and that you are using Process Version 2012.
I am using LRCC. Additionally, after the slider disappeared I attempted to install an update through Creative Cloud and now LR will not open.
I am using a Mac Book Pro bought in August of 2009 with OS 10.11.5. The GPU is NVIDIA GeForce 9400M 256MB.
I am using LRCC.
The specific request was for you to confirm you were using LR CC 2015.1 or later. Please provide the version number.
Additionally, after the slider disappeared I attempted to install an update through Creative Cloud and now LR will not open.
Please describe in detail what happens, and quote any error message word-for-word.
The message I receive when attempting to open LR is, the application "Adobe Lightroom" can't be opened.
when attempting to update Lightroon CC through the CC I first get a msg, Update Failed.
When I go to "Learn More" I get the msg, Update Failed Errors encountered during installation (U44M1P7)
Uninstall the current version of LR and then Reinstall and update.