I've been experiencing a frustrating problem with iCloud Safari tab syncing over the past year or so. In the past, I was able to have a Safari tab open on my iPhone, go to my iMac, and open the same tab, without having to bookmark it first on my iPhone. Now, post-High Sierra, I've lost that ability. It's not an iCloud problem, per se, because iCloud Notes works perfectly, as does Safari bookmarks, and contacts. I've logged out and back into iCloud on both devices, multiple times. My fear for this is that I'm not going to be able to get that ability back again. I have a suspicion that it's going to be an incompatibility between HIgh Sierra and iOS10. Is anyone else having this problem? Even better, has anyone found a solution?