On Thu, Jan 30, 2020 at 11:05 AM Yasha Karant <ykar...@csusb.edu> wrote:
> I attempted to upgrade Calibre to the current production release. It > fails to run (I can post my question) but the response given is: > > I think they are just giving up on supporting anything older at all now that they've moved from QT WebKit to QT WebEngine in Calibre 4 and also the ongoing effort to move to Python 3. https://urldefense.proofpoint.com/v2/url?u=https-3A__calibre-2Debook.com_new-2Din_thirteen&d=DwIBaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=7QI6okusGGGNrCvuoD4tmh6ctqYIZM9p9rtMW2lRe74&s=L2hICLSVqaaSWWZvess69_aejmnXxlIGbHA4kg4NUQA&e= They have even dropped all versions of macOS prior to 10.14 (released late 2018). https://urldefense.proofpoint.com/v2/url?u=https-3A__calibre-2Debook.com_download-5Fosx&d=DwIBaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=7QI6okusGGGNrCvuoD4tmh6ctqYIZM9p9rtMW2lRe74&s=JL_zDiQ9PoYqHhpumfC6Hn0eG1Sc46zSv50uhWJugSA&e= If you can't install the flatpak your best bet is probably to stick with Calibre 3 if you want to keep using it on anything they don't expressly support.
