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I tried to install big sur on my probook 4540s by opencore guide. Installer stuck at 14 min remain by error: Intallation cannot be proceed because the installer is damaged. I redownload big sur again but same error. I tried change time using terminal in recovery but same error. Any suggestions...

i tried to install mojave on probook by Rehabman hotpatck method but in post installation level it seems bitbucket link for kext an ect downloading didn't work anymore.with and without vpn please help

i have not acces to mac for now. piease edit this plist file as the image i atach and upload here blue is the original that be change to yellow thanx all

my 2 drive can't be mounted. first one is mounted in startup but only readonly.after trying to repair by disk utility will be unmounted. number 2 is not mounted from startup.i try to repair in single mode and recovery mode but no lucky. please help me to repair theme. first one is Mutimedia...

I have probook 4540s and high sierra installed on it. but battery statuse not worked. i patched dsdt and replace it on patched folder in efi/clover/acpi. now i cant boot to hdd anywhere.i try to boot by usb but no chance. i do misstake in patching. is there a way to copy clover folder from usb...

hi i had installed yosemite on my 4540s using clover guide.yesterday i updated it directly to el capitan.unfurtuntly i losed audio.no audio device found. every thing work fine exept sound.how can i fix it? if it possible for you show me simple way.i am not pro.

I have el capitan clover edition on my probook. I prepare a windows 10 bootable usb by rufus.now i cant reach windows installer on clover bootloader.boot from efi..... Bootloader show me boot from micrisoft windows...boot from el capitan...boot from recovery.but when i click on windows bootable...

I have install yosemite on my brobook 4540s 1 or 2 years ago by clover guide and it worked for me very well till yesterday.from yesterday it stuk on a dark screen after clover bootscreen.i try to boot by using my instaler flash usb and it work.i try to install probook installer and it cant...

I have 450 g2 laptop and try ton install yosemite whit clover on it.after clover boot screen when i select Boot OS X Install from Install OS X Yosemite it show this dialog box:this version of os x is not supprted this platform. my bootable flash is ok and efi file that i select is correct...

I had update hp probook 4540s yosemite 10.10.2 to 10.10.3 today and now i can boot only in safe mode. in clover bootscreen i tried f4 to acces option menu but nothing happened. i tried to boot verbose to troubleshouting but it reboot again. anybody can help me? sorry for my bad english