I’ve had LibreOffice for years. Now with the release of 126.96.36.199, I can’t open the app because “the identity of the developer cannot be confirmed.” Get the same error message for 4.2.6. I run a Mac Book Pro, 13", mid-2009, 8 GB, 2.26 GHz 1067 MHz DDR3. The OS is 10.9.5.
(I’ll be 75 next month; live mostly on Social Security, so it might be imprudent for me to talk about donating to your worthy cause.)