If this is not enough, you might need to wait until the next update of Mac OS Catalina. You might also need to change the Default Signing Format to CAdES-Equivalent Make sure Enable CryptoTokenKit framework support is checked. In the Creation and Appearance section, click More Check the box next to your file name, then click the Edit PDF button on the Edit Tab. Drag your PDF file on to the document dropzone above, or click Upload to choose a file from your computer.
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Under Categories, scroll down to Signatures Here’s how to edit a PDF for free, online in 3 easy steps: Step 1: Upload PDF file. Select the words Adobe Reader (at the top of the screen) Mac OS 10.15 (Catalina) users if you are unable to sign a PDF using Adobe, please verify this setting on your Mac: I clicked "always allow" and didn't have to do it the next time I signed. After I did this, when I tried to sign a PDF with my CAC signature for the first time I had to click through about 10 windows asking for my computer password to enable different permissions. USB C Adapter for MacBook Pro MacBook Air 13 15 16 inch 2020/2019/2018, USBC HDMI Dongle with 4K HDMI,1USB 3.0&1USB 2.0 Port,Gigabit Ethernet,SD/TF Reader,Thunderbolt 3 and USB C Port. I already had "Enable CryptoTokenKit framework support" checked, but needed to change "Default Signing Format" to "CAdES-Equivalent." That seemed to do the trick. They say to do this on Adobe Reader, but the same instructions worked for me on Acrobat Pro 2017. While a USB-C card reader wont necessarily give you all the options that the best USB-C hubs for Mac can, they are typically less expensive.
Below is what the process they outlined that worked for me. The best USB-C card readers for Mac will let you connect your SD cards, microSD, and in some cases, even Compact Flash card to your Mac, so you can transfer files and photos with ease. I have been dealing with this issue, and just found a solution on Militar圜AC.com.