If you sold V1 for $5.00 and then you want to sell V2 to new customers for $5.00 but existing customers. You can bundle the two versions for $8.00 and in the description for V1 you tell them that version 2 is available and don't buy it. You tell customers that have bought V1 already to get the bundle for $3.
That's an interesting workaround. The question I meant to raise was whether a workaround is justified, or whether software developers should just maintain the apps they sell.
It depends. If your app can work within the sandbox and it's a one and done like a game, maybe. The Mac platform changes so slowly you don't have to worry as much about incompatibility with s new OS as you do iOS.
But if you ever want paid upgrades or you are already a well known app -no.
For instance it wouldn't make any sense for MS or Adobe to be in the Mac App Store.
You can emulate upgrade pricing via bundles.
If you sold V1 for $5.00 and then you want to sell V2 to new customers for $5.00 but existing customers. You can bundle the two versions for $8.00 and in the description for V1 you tell them that version 2 is available and don't buy it. You tell customers that have bought V1 already to get the bundle for $3.