如同VMware編輯vmx檔案，Parallels Desktop也有一個進階調整虛擬機設定的boot flag列表，各flag的功能別問我，我也不知道，不知為何關於這部分的資訊幾乎查不到 
在分享之前先介紹如何取得，方便未來更新PD後能夠取得新版flag
1. 安裝Homebrew
| /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" |
2. 安裝pcregrep
| brew install pcre |
3. 取得boot flags
| pcregrep --buffer-size 2M -e "\x00((devices\\.|kernel\\.|video\\.|vm\\.)+(?:[a-z0-9-_]+\\.)+[a-z0-9-_]+)\x00" -o --text /Applications/Parallels\ Desktop.app/Contents/MacOS/Parallels\ VM.app/Contents/MacOS/prl_vm_app | sort |
就醬，懶得自己取得的人就往下看吧
PD18的完整flag列表：
devices.acpi.vmgid
devices.acpi.whea
devices.ahci.aen
devices.ahci.ata_pio
devices.ahci.ncq
devices.all.prio
devices.apic.disable
devices.apic.mp_table
devices.audio.aec
devices.audio.capture.host_latency
devices.audio.capture.max_latency
devices.audio.capture.slave.type
devices.audio.core
devices.audio.playback.host_latency
devices.audio.playback.min_latency
devices.audio.playback.slave.type
devices.audio.playback.volume_apply_policy
devices.audio.pv_flags
devices.battery.show
devices.bios.numlock
devices.camera.black_list
devices.dmg.stub
devices.dmi.dimm
devices.dmi.enable
devices.dvd.share_access
devices.hdd.aio
devices.hdd.aio_threads
devices.hdd.boot_rcache_deadline
devices.hdd.boot_rcache_size
devices.hdd.cache_ctl
devices.hdd.cbt
devices.hdd.compact_move_threshold
devices.hdd.compact_threshold
devices.hdd.deadline
devices.hdd.extend_writes
devices.hdd.fast_submit
devices.hdd.force_read_bb
devices.hdd.force_write_bb
devices.hdd.fsync
devices.hdd.kick
devices.hdd.kick_delay
devices.hdd.large_queue
devices.hdd.max_block_move
devices.hdd.max_req_size
devices.hdd.oscache
devices.hdd.pcache.align4k
devices.hdd.pcache.dynamic_readahead
devices.hdd.pcache.enable
devices.hdd.pcache.prefetch
devices.hdd.pcache.ra_scale_factor
devices.hdd.pss4k
devices.hdd.quota
devices.hdd.raw
devices.hdd.rh
devices.hdd.rh_merge_threshold
devices.hdd.rh_reqs
devices.hdd.rh_size
devices.hdd.sort
devices.hdd.ssd
devices.hdd.tg_event
devices.hdd.validation_lvl
devices.hdd.verifier
devices.hdd.wcache_enable_threshold
devices.hid.abs_moves
devices.hid.bogus_moves
devices.hid.delay.time
devices.hid.delayed.keys
devices.hid.log.keyboard
devices.hid.log.pen
devices.hid.pen.moves
devices.hid.ps2.keys
devices.hid.ps2.moves
devices.hid.ps2.sm.overrun
devices.hid.ps2.sm.split
devices.hid.scancodes
devices.hid.uiemu.hwheel
devices.hid.usb.abs_border_x
devices.hid.usb.keys
devices.hid.usb.moves
devices.ide.irq_level
devices.kbd.delay_ms
devices.log.mode
devices.mac.boot_args
devices.mac.csr-active-config
devices.mac.csr.add_prl_team
devices.mac.native_smc
devices.net.activate_resched
devices.net.allow_promisc
devices.net.dhcp.notify
devices.net.dhcp.notify
devices.net.dhcp_use_host_mac
devices.net.direct_rx
devices.net.e1000.mtu
devices.net.force_adapter_type
devices.net.force_wifi
devices.net.mode
devices.net.rx.buf_time_ms
devices.net.sleep_disconnects_link
devices.net.tap
devices.net.track_link_status
devices.net.track_location
devices.net.tx.buf_time_ms
devices.net.virtio.direct_rx
devices.net.virtio.event_idx
devices.net.virtio.posted_interrupts
devices.net.virtio.tx_offload
devices.net.vmnet.bind_timeout
devices.net.vmnet.bind_timeout2
devices.net.vmnet.patch_mac
devices.net.vmnet.store_mac
devices.net.wifi_router
devices.nvme.enable
devices.nvme.tx_sz_kb
devices.nvme.wce
devices.pen.test
devices.printer.ipp
devices.printer.keep_spool
devices.printer.mfg
devices.printer.new_engine
devices.printer.timeout
devices.privacy.bluetooth
devices.privacy.camera
devices.scsi.forceint
devices.scsi.hpq
devices.scsi.thin_provision
devices.scsi.unmap_gran
devices.serial.transfer_period
devices.sfilter.adev_activate
devices.sfilter.disable_after_resume
devices.sfilter.enable
devices.sfilter.queue
devices.smbios.biosver
devices.smbios.board_id
devices.smbios.cpu_vendor
devices.smbios.maxram
devices.smbios.serial
devices.smbios.use_host_uuid
devices.sound.capture.fifo.threshold.underrun
devices.sound.capture.fifo.wsize
devices.sound.capture.guest.rate
devices.sound.capture.host.channels
devices.sound.capture.host.format
devices.sound.capture.speedup.song
devices.sound.capture.underrun.song
devices.sound.force_mono
devices.sound.playback.err.current
devices.sound.playback.fifo.load
devices.sound.playback.fifo.silence
devices.sound.playback.fifo.threshold.overrun
devices.sound.playback.guest.channels
devices.sound.playback.guest.format
devices.sound.playback.host.rate
devices.threadpool.timeout
devices.tpm.enable
devices.usb.active_poll_timeout
devices.usb.blackberry_quirk
devices.usb.bluetooth_pid
devices.usb.bulk.in
devices.usb.bulk.out
devices.usb.ehc.translate_ss
devices.usb.ehc_rollover_timeout
devices.usb.ehci.process_frame
devices.usb.ehci.processpkt
devices.usb.ehci.timeout
devices.usb.ehci.vcpusignal
devices.usb.ehci.vcpusignal.flr
devices.usb.ehci.vcpusignal.int
devices.usb.enable_reconnect
devices.usb.enumerate_boost_duration
devices.usb.grab_port
devices.usb.hide_uas
devices.usb.iso.in_requested
devices.usb.keyboard
devices.usb.keyboard.fastpoll
devices.usb.keyboard_pid
devices.usb.loglevel
devices.usb.max_urb_size
devices.usb.mouse
devices.usb.mouse.fastpoll
devices.usb.msc.bufsz.max_rd
devices.usb.msc.bufsz.max_wr
devices.usb.msc_fsync
devices.usb.msc_read_mode
devices.usb.msc_rmb
devices.usb.msc_type
devices.usb.msc_uasp
devices.usb.speed.bluetooth
devices.usb.speed.ccid
devices.usb.speed.keyboard
devices.usb.speed.printer
devices.usb.td.out
devices.usb.timeout
devices.usb.uhc
devices.usb.uhc_td_loglimit
devices.usb.uhci.ioasynccallback
devices.usb.uhci.process_frame
devices.usb.uhci.vcpusignal.total
devices.usb.use_libusb
devices.usb.uvc.hframes
devices.usb.uvc.pload_cntr
devices.usb.uvc.vframes
devices.usb.webcam_src
devices.usb.xhc
devices.usb.xhc_ready_timeout
devices.usb.xhci.ioasynccallback
devices.usb.xhci.process_frame
devices.usb.xhci.vcpusignal.total
devices.uvc.bulk
devices.uvc.detailed_log
devices.uvc.dup_nv12_yuyv
devices.uvc.hide_portrait_video_frame_formats
devices.uvc.jpeg_quality
devices.uvc.lock_frame_rate
devices.uvc.nv12_range
devices.uvc.yuyv_range
kernel.cpu.cache_level
kernel.cpu.quota
kernel.hibernate.smap_type
kernel.inv_tsc.max_diff
kernel.invpcid.enable
kernel.nsvm.enable
kernel.nvmx.enable
kernel.nxbit.enable
kernel.perf_mon.enable
kernel.pm_timer.32bit
kernel.power.period
kernel.pse36.enable
kernel.smap.enable
kernel.vcpu.sse
kernel.waet.enable
video.mtl.convert_indirect_args_on_cpu
video.mtl.dx9_fake_max_float
video.mtl.emulate_tessellator
video.mtl.fast_math_mode
video.mtl.fix_blit_heap_buffers
video.mtl.fix_compute_with_vdecl
video.mtl.fix_depth_texture_sample_count_2
video.mtl.fix_draw_calls_without_pixel_shader
video.mtl.fix_encoder_in_res_manager
video.mtl.fix_float_textures
video.mtl.fix_heap_index_buffers
video.mtl.fix_indexable_registers
video.mtl.fix_pipeline_stats_counter_first_use
video.mtl.fix_precise_rsqrt
video.mtl.fix_primitive_restart
video.mtl.fix_private_indirect_buffers
video.mtl.fix_resolve_counters_freeze
video.mtl.fix_resolve_counters_offset
video.mtl.fix_resolve_to_non_zero_face_or_level
video.mtl.fix_sample_counters_in_blit_encoder
video.mtl.fix_sin_cos
video.mtl.fix_temporary_registers
video.mtl.fix_tessellator_arrays
video.mtl.fix_texture3d_get_depth
video.mtl.fix_usage_render_target
video.mtl.logic_op_mode
video.mtl.max_argument_buffer_resource_count
video.mtl.max_heap_queue_length
video.mtl.max_heap_size_per_draw
video.mtl.native_texture_buffer_alignment
video.mtl.override_report_failure
video.mtl.render_memory_barriers_supported
video.mtl.use_vdecl_for_stages
video.mtl.use_workaround_for_writing_in_vs
vm.acpi.facs_hw_signature
vm.balloon.sare
vm.bios.efi
vm.bios.efi.cd_use_noprompt
vm.bios.efi.limit_low_bit_video
vm.bios.efi.limit_video
vm.bios.efi.wait_usb
vm.compressor.map
vm.compressor.threads
vm.compressor.use_lz4
vm.dark_wake.enable
vm.dark_wake.period
vm.debug.anyhost
vm.debug.boot
vm.debug.gdb_stub.guest.port
vm.debug.osabi
vm.debug.server
vm.devel.non_preemptive_monevents
vm.efi.debug
vm.efi.hv_vendor_id
vm.efi.ignore_bootopt
vm.efi.legacyboot
vm.efi.mac.x2apic
vm.efi.mac_recovery
vm.efi.secureboot
vm.efi.smbios_ver
vm.efi.stub_console
vm.hugepages.enabled
vm.iopolicy.fg
vm.iopolicy.tm
vm.mouse.scroll.minpix
vm.perfcnt.dump
vm.profiler.latency_cycles
vm.profiler.region_sz
vm.profiler.work_cycle
vm.snapshot.compressed
vm.snapshot.use_lz4
