macOS: reduce ram usage

readme.txt

- disable SIP
# boot in recovery mode (Command + R)
# open utilities / terminal
$ csrutil disable

- disable Spotlight indexing
$ sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist

- change swapper default mode
vm_pageout.h:
#define VM_PAGER_DEFAULT                        0x1  /* Use default pager. */
#define VM_PAGER_COMPRESSOR_NO_SWAP             0x2  /* In-core compressor only. */
#define VM_PAGER_COMPRESSOR_WITH_SWAP           0x4  /* In-core compressor + swap backend. */
#define VM_PAGER_FREEZER_DEFAULT                0x8  /* Freezer backed by default pager.*/
#define VM_PAGER_FREEZER_COMPRESSOR_NO_SWAP     0x10 /* Freezer backed by in-core compressor only i.e. frozen data remain in-core compressed.*/
#define VM_PAGER_FREEZER_COMPRESSOR_WITH_SWAP   0x20 /* Freezer backed by in-core compressor with swap support too.*/

$ sysctl -a vm.compressor_mode
vm.compressor_mode: 4

$ sudo nvram boot-args="vm_compressor=2"