You can download PDF Signet 1.3 for Mac from our software library for free. This Mac download was scanned by our built-in antivirus and was rated as safe.
From the developer:
Sign your invoices and other PDF documents with your certificate, stored in Keychain or on a smartcard.
You may want to check out more software for Mac, such as A-PDF Watermark for Mac, SysTools Mac PDF Unlocker or PDF Reader Pro Free, which might be similar to PDF Signet.