$ /Volumes/Android/cm/cm-13.0/out/host/darwin-x86/bin/imgdiff /Volumes/Android/cm/cm-13.0/out/target/product/fugu/boot.img /Volumes/Android/cm/cm-13.0/out/target/product/fugu/recovery.img /Volumes/Android/cm/cm-13.0/out/target/product/fugu/obj/PACKAGING/recovery_patch_intermediates/recovery_from_boot.p
chunk 0: type 0 start 0 len 5240842
chunk 1: type 2 start 5240842 len 2585856
chunk 2: type 0 start 6321845 len 8523
Construct patches for 3 chunks...
patch   0 is 246 bytes (of 5240842)
patch   1 is 455706 bytes (of 1081003)
patch   2 is 205 bytes (of 8523)
chunk   0: normal   (         0,   10481674)         246
chunk   1: deflate  (  10481674,    1820042)      455706  (null)
chunk   2: normal   (  12301716,      17004)         205

bmc at hackintosh in /Volumes/Android/cm/cm-13.0
$