Right now unc0ver supports iOS versions from iOS 11.0 - 14.3, AND IOS 14.4-14.5.1 is supported on A12-A14.
Right now the best way to install unc0ver is Altstore. You can download it from Windows Software page.
To Install unc0ver IPA using your MacBook or Laptop, you can try out the following tutorials:
When you are done with this, you can use my tutorial to resign unc0ver without a PC, and after that you wont even need to refresh the apps using Altstore:
WATCH NOW !!!UNC0VER NO PC TUTORIAL !!! JAILBREAK iOS 13.5 ON ANY DEVICE!