Photoshop is saving PSBs and TIFFs with the wrong suffix in Catalina
This is the output of the UNIX "file(1)" command on a panorama shot saved in "large file format":
2019-10-11-06-49-07.tif: Adobe Photoshop Image (PSB), ...
When I loaded the *.tif file back up, Ps understood it to be a PSB file. OK. Fine. I brought the image down to one flattened layer and saved it as a TIFF:
2019-10-11-06-49-07.psb: TIFF image data, big-endian, ...
Lightroom, of course, won't even glance at something called, "xxx.psb" and unsurprisingly it didn't grok the .tif file either.
Way clever, Adobe. I don't happen to want the PSB file, so I will delete the *.tif file and rename the *.psb to be *.tif. I am using the latest and greatest update to Photoshop on a Mac running whatever last week's release of OS/X was called.