Since 30 September 2018 (*), I already had information regarding discontinuation by NAVX Studio LLC of the development of two historical applications created by Richard Ray : GPSNavX and MacENC. The buyers of these applications and iNavX had clearly announced focuse only to the development of iNavX, on iOS and Android. It is likely that applications on Mac no longer had any profitability, especially with the loss of Navionics charts for MacENC.
The announcement is now official, GPSNavX is permanently removed from the AppStore and MacENC will be removed from sale on iNavX website :
"Just a glimpse into the future of MacENC. [The app] MacENC will not receive any future updates and it will be taken off the market sometime this week. As long as you do not update your Macintosh computer to Mojave, it should continue to function pretty well. However, it is very limited on computers using Mac OS X Mojave.
Support MacENC »
That is. It now remains for Mac only OpenCPN, which is far from the ergonomics and professional quality had yet MacENC. It's really sad !
[Update May, 2020] MacENC is no longer for sale and no longer works under the latest MacOS versions 64 bits since late 2018. However, the application is being modernized by a new developer who bought the sources. It should therefore be available again before the end of the year under the name MacENC64. I will continue to provide the French translation.
(*) Navionics charts are no longer available for MacENC [Update]