Doesn't compile from command line.

[shmohawk]

Mostly because ld can't find symbols. Adding a blueutil.h with following content fixed it for me:

//
//  blueutil.h
//  blueutil
//
//  Created by Brian Reiter on 4/27/15.
//
//

#ifndef blueutil_blueutil_h
#define blueutil_blueutil_h

int BTPowerState();
int BTSetPowerState(int powerState);
void BTStatus();

#endif

Now it compiles with clang -framework Foundation -framework IOBluetooth -o blueutil blueutil.c (or clang++ -framework Foundation -framework IOBluetooth -o blueutil blueutil.m for the ObjC version).

It may also be noted that if Bluetooth can't be activated via the control panel, neither can blueutil. But that's a different issue.

[shmohawk]

But that's a different issue.

BrcmPatchRAM. Afterwards blueutil works fine on 10.15.