惠普820G3，惠普820G4，都可以下载安装；
先说下，在度娘搜到bilili作者：App没有le
安装视频下EFI的下载地址：https://osxlatitude.com/forums/topic/13130-hp-elitebook-840-g3-macos-catalina/
1.下面留言很多说，无法下载，或者注册安全未通过等，想解决的，要翻墙去注册才能通过安全检测；
2.分享出来我下载好的，各位尽情食用（用户组有限制，无法上传附件），百度云链接给你们，失效了留言我去补，
链接: https://pan.baidu.com/s/1G2EY4NDKpBt9TmKoAIKU2A 提取码: rn2t 复制这段内容后打开百度网盘手机App，操作更方便哦 --来自百度网盘超级会员v2的分享
因还在安装未测试，有兴趣可以转bilili搜下视频看原作者的视频，再次感谢bilili作者：App没有le（如有侵犯，请留言删除本帖）
另附上国外的玩家更新的内容：
Specifications:
- Intel 6th generation Core i5-6200U 2.3 GHz, up to 2.8 GHz with Intel Turbo Boost Technology, 3 MB cache, 2 cores
- Integrated Intel HD Graphics 520
- Non touch 35.6 cm (14 in) diagonal LED backlight FHD Slim eDP SVA Anti-glare (1920 x 1080) with camera
- System can be configured with a hard drive and M.2 SSD drive / NVMe
- 8192 MB total system memory (8192 MB x 1) Up to 32 GB - DDR4 PC4-17000 (Transfer rates up to 2133 MT/s)
- Intel Wireless-AC 3165 802.11 a/b/g/n/ac (1 x 1) WiFi and Bluetooth 4.0 combo (non-vPro)
- HP Module with NXP NFC Controller NPC100
- Intel Ethernet Connection I219-V 10/100/1000 Ethernet
- Synaptics Touchpad
- Audiio Conexant CX20724 - VendorID: 0x14f150f4
- Integrated HD Webcam
- (1) USB 3.1 Gen 1 charging
- (1) USB 3.1 Gen 1
- (1) USB Basic Type-C
- (1) DisplayPort
- (1) VGA
- (1) RJ-45/Ethernet
- (1) Docking connector
- (1) Headphone/microphone combo
- (1) AC
- (1) External SIM
- (1) SD media card reader, supports SD, SDHC, SDXC
Working: - full graphics acceleration on Intel HD520 iGPU, including brightness control (F5 and F6)
- multi-display with DisplayPort OOB, VGA and HDMI over USB Type-C
- audio, microphone input and headset output (F8 and F9) - Mute button not working
- GigEthernet LAN connection
- wireless and bluetooth with any compatible card (a DW1560 in my case, no Whitelisting)
- left and right USB ports including USB Type-C
- integrated webcam (OOB)
- CPU power management
- sleep (Lid, Energy Saver settings, Apple menu, PWR button) & wake (Lid, PWR button)
- battery management (with SMCBatteryManager v1.0)
- keyboard and touchpad (with VoodooPS2Controller v1.9.2)
- keyboard backlight (Fn + F3)
- touchpad including tap-to-click, scrolling, mouse buttons (can be disable with prt scr key)
Partially working: - RTS522a microSD card reader (read-only mode) - after sleep, need to eject and reinsert
New updated [color=rgb( var(--theme-link) )]kext allow read and write
Not working: - TrackStick
- Finger Print reader
- Wifi button
- Mute button (grayed out)
感谢远景论坛，生命不止，折腾不息！ | 
