升級前沒確認網卡會不會有問題，以為跟往常一樣，升級後頂多重裝就會生效，
結果悲劇，連 j5create 英文官網也說目前尚未支援 Big Sur 冏rz，
只好 google 大神…
先聲明：筆者目前只提供 bata 版，因工作需要，先解決不能用的問題，不急的可等到正式版發佈再安裝
確認版本：以下為簡單判斷網卡晶片是否為 AX88179
AX88179 原廠晶片驅動下載 (筆者目前下載為 AX88179_178A_macOS_10.9_to_11_Driver_Installer_v2.19.0_beta2 ，未來可能會有更新的版本)：
操作步驟 (以下為網友提供的操作方式，筆者試過可行，只是原提供者SIP後來沒開啟，所以有多做SIP重啟)：
英文原版：
1- Unplug your USB-Ethernet device.
2- Get the latest version and discard all advices about using older versions. Get version 2.19 (beta2) which is currently available. Do NOT install driver now !
3- Uninstall old driver first using the uninstaller that comes with the latest driver. You will have to restart.
4- Wait your screen to be off due to Restart, then directly... (next point)
5- Keep holding Command+R wile your PC is booting. Keep holding until the Apple logo appears. (If you fail to enter recovery mode, shut down and repeat this point).
6- Select your account and enter password.
7- Choose Utilities > Terminal.
8- csrutil disable
9- /usr/sbin/spctl kext-consent list
10- If 5RHFAZ9D4P is not in the list, enter: /usr/sbin/spctl kext-consent add 5RHFAZ9D4P . Otherwise, skip this point.
11- Restart you mac.
12- This is the critical point which you might miss from all other instructions available: Remove Allow permission you provided earlier to asix team (5RHFAZ9D4P). This is important to let your OS accept the device again. Follow these steps carefully:
sudo su
(enter your password if prompted), then...
sqlite3 /var/db/SystemPolicyConfiguration/KextPolicy
delete from kextloadhistoryv3 where teamid='5RHFAZ9D4P';
delete from kextpolicy where teamid='5RHFAZ9D4P';
.quit
13- Install driver.
14- Now you will be prompt to Allow this driver in System Preferences -> Security & Privacy.
15- Connect your USB-Ethernet device.
16- Your USB-Ethernet device should work by now. Ensure you have ethernet connected to router/Switch to verify.
17- If it does not yet work, try running this in terminal: sudo kextload -b com.asix.driver.ax88179-178a中文操作版：
1- 拔掉 USB 實體網卡
2- 請先下載最新的驅動程式 ( 目前是2.19 beta2 )，但不要先安裝，不要先安裝，不要先安裝，很重要
3- 移除舊的驅動程式，移除的方式從舊驅動 dmg 檔裡，執行 xxxxx.Uninstall.command，之後重新啟動 macOS
4- 等到變成黑畫面的時候，馬上持續「按住」command+R 不要放開，直到蘋果系統進入 recovery 模式
6- 選擇原本登入Mac的帳號，並輸入密碼
7- 選擇 Utilities > Terminal. ( 筆者語系預設英文，應該不會有中文介面吧？！XD 有的話應該是 應用工具 > 終端機 )
8- 輸入 csrutil disable ( 會關閉SIP保護，之後安裝完成可再開啟 )
9- 輸入 /usr/sbin/spctl kext-consent list
10- 看一下清單是否有 5RHFAZ9D4P 這個項目, 如果有則略過，如果沒則輸入 /usr/sbin/spctl kext-consent add 5RHFAZ9D4P
11- 重新啟動 macOS ( 不需要再按 command+R )
12- 進 macOS 後，開啟 Terminal，輸入
sudo su
(輸入密碼後...)
sqlite3 /var/db/SystemPolicyConfiguration/KextPolicy
delete from kextloadhistoryv3 where teamid='5RHFAZ9D4P';
delete from kextpolicy where teamid='5RHFAZ9D4P';
.quit
13- 安裝新的驅動程式
14- 可能會出現安裝性需求授權，在 System Preferences -> Security & Privacy. 按接受
15- 連接你的實體網卡，理論上應該是可以運作，並且能上網 ( 如果無法運作，則嘗試執行第16步，如果可以，則執行第18步 )
16- 如果不能正常運作的話，開啟 Terminal 輸入 sudo kextload -b com.asix.driver.ax88179-178a
17- 輸入完16步後，有可能需要重啟 macOS 才能生效
18- 重啟 macOS 並在黑畫面的時候，按住 command+R 進入 recovery 模式
19- 選擇 Utilities > Terminal.
20- 輸入 csrutil enable (開啟 SIP 保護)
21- 重新啟動 macOS
參考來源：
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