MacdeMacBook-Pro:~ mac$ adb devices
List of devices attached
0021e8d2e115e57a device
MacdeMacBook-Pro:~ mac$ adb install -r ~/downloads/app-release.apk
failed to copy '/Users/mac/downloads/app-release.apk' to '/data/local/tmp/app-release.apk': Permission denied
MacdeMacBook-Pro:~ mac$