I've tried to troubleshoot this from forum posts on Yosemite and the workarounds aren't helping using terminal and diskutil commands. For the upgrade to 10.11 I get the following error on the install:
"This Core Storage operation is not allowed on a sparse logical volume group"
Anyone run in to that and found a way around it for El Cap upgrades?
"This Core Storage operation is not allowed on a sparse logical volume group"
Anyone run in to that and found a way around it for El Cap upgrades?