4 weeks ago
I can confirm that 10.13.2 does not always solve the problem. My lab upgraded from Sierra to High Sierra (directly to 10.13.2) and EndNote has become unusable for several users in the manner described above.
3 weeks ago
I reported this problem to Clarivate technical support, as my installation of Endnote had become unusably slow. They suggested that upgrading MacOS to the latest version of High Sierra (10.13.3) (I had previously upgaded to the latest version of Endnote X8.2 and it was still very slow) and this combination resolves the problem. Now Endnote functions as I would expect it to, Wow, night and day! Endnote is usable again.
Still ridiculously slow on my mac. I'm running 10.13.3 and the latest EndNote 8 update. It's garbage for me right now. I am on my 30-day trial. I used to use EndNote X7, so I figured I'd take this one for a spin. I won't be buying it if this is what it's going to be like while writing my thesis. I'll go with Zotero or something else, even if they're not as good. This is absolutely useless to work with for how expensive it is. Takes up to 90 seconds to update, even when I'm just removing some artifacts from exporting citations from my university's website. 90 seconds to remove the word "NEW YORK"?!
Our workaround was to install a virtual Windows machine on my student worker's Macbook Pro (2017) and running the Windows version of EndNote... It seems to run at full speed now.
I did test out Mendeley, which seemed very promising, but there's no way to replicate our existing folder assignments without manually reassigning every publication.