Instead of running "monero-blockchain-prune" (which seem to have been removed), you can run "monerod" with the "--prune-blockchain" flag.
On macOS, you'll need to use Terminal. cd to the folder that contains "monerod", then run "./monerod --prune-blockchain".
Here's what it looked like when I ran it. (It is still running, pruning the blockchain will take some time, but far less than 5 days to download it all again).
QuinnHex:~ mike$ cd /Applications/monero-wallet-gui.app/Contents/MacOS/
QuinnHex:MacOS mike$ ./monerod --prune-blockchain
2022-01-26 07:00:26.759 I Monero 'Oxygen Orion' (v0.17.2.3-release)
2022-01-26 07:00:26.760 I Initializing cryptonote protocol...
2022-01-26 07:00:26.760 I Cryptonote protocol initialized OK
2022-01-26 07:00:26.761 I Initializing core...
2022-01-26 07:00:26.762 I Loading blockchain from folder /Users/mike/.bitmonero/lmdb ...
2022-01-26 07:00:26.840 I Loading checkpoints
2022-01-26 07:00:26.841 I Pruning blockchain...