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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...

download linke? where i willl be install or past?clover/kext or by kext utility?

yes i do i did complet this installation for el capitan,mojave and catalina may times successfully but now no lucky.

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

My os before problem was Mojave that i upgrade it to catalina whiteout any issue.but some days ago i update clover to last version and my os had gone.i did every thing but no lucky and had to install yosemite. last version of c;over have problem

I have to install Yosemite from my old USB yoermite install whit probe installer. now I tried to transite from PBI to Hotpatch but have problem whit downloading. i tried with and without VPN but no lucky

created mojave installer by rehabman guide(i use this metode many times with success.by for now,after installation when in last level it stuck at grey screen.instalation from usb completed,and it most be boot. From hdd to complet last level but... I atach screen shot

I created mojave installer by rehabman guide(i use this metode many times with success.by for now,after installation when in last level it stuck at grey screen.instalation from usb completed,and it most be boot. From hdd to complet last level but... I atach screen shot

i use your efi folder butbinstaler in last level(load install catalina) said internet connection needed. lan connection is ok.

notepad can not show it if possible for you please edit it

i use my mobile data for internet i have not modem router

your guide need internet to be complet but my probook wifi card is atheros and in intallation process i have not it

i created a installer by your guide but it goes to recovery and for install need internet. i downliad full 8 gb catalina

by a mistak i deleted my efi folder from hdd and only can boot to windows.i have not usb installer to boot to mac and have to creat another one. and decided to use openvore method

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

Hello every one. I updated my prebook 4540s to Catalina directly. every thing works fine,exept wifi! my wifi connect to network and work perfectly, but some time lose signals and modem name. my modem is ok. I had to restart laptop to resolve issue. prebook 4540s Catalina(install by hot patch...

Hi bro i have probook 4540s. i used your site guide frome maveriks to mojave. after updating to mojave..my 4540s is lagy and slow on loanch apps for first use. sometimes finder will crash. what you think?

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...

abm

yes aim