According to Apple, "When you install macOS High Sierra on the Mac volume of a solid-state drive (SSD) or other all-flash storage device, that volume is automatically converted to APFS." --https://support.apple.com/en-gb/HT208018Note that this is not a problem for non-SSD drives, so the problem is not as wide-spread as I first thought. Also, as a workaround, you can set the following in the stone config file:
STN_ALLOW_NFS_EXTENTS=TRUE;
Watch the release notes for an eventual fix.
James Foster
"GemStone is unable to open the file /Users/jfoster/Library/GemStone/db4/data/extent0.dbf”
If you need to run GemStone on a Mac, I’d suggest you wait till this is resolved before upgrading. Stay tuned for more information...
James Foster
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