The LiDE 70 is one of these scanners. Generally, if the scanner has a driver for Mac OS X 10.7 or later on www.canon.com, it has a dual 32-bit and 64-bit driver and VueScan will work with it on Catalina.' So try to install a pre-catalina driver and then try vuescan again. Canon scanner drivers free download - Apple Canon Print Drivers, Canon CanoScan LiDE 20, SilverFast Canon Scanner, and many more programs.
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