#Install mac os x lion app how to#

#Install mac os x lion app how to#

Keep holding down the keys until the computer restarts itself again (maybe ten or fifteen seconds at most), macOS Ventura and OS X Monterey Hackintosh instructions, tutorials, step-by-step how to guides and installation videos Hackintosh systems, parts and more.Hold down “Command”, “Option”, “P” and “R” on the keyboard, Unlike previous versions of Mac OS X, Lion (OS X 10.7) doesn’t ship on a bootable discit’s available only as an installer app downloadable from the Mac App Store, and that installer doesn.What I discovered was that the setup for Lion seems to store data in the PRAM (Parameter Random Access Memory) and if this data is corrupted or becomes stale it becomes necessary to reset it in order to undertake a successful installation. Quite non-descript and quite unhelpful and even a format and subsequent reinstall didn’t fix the problem. “There was a problem installing Mac OS X”. Another significant problem I encountered was after the initial installation, I kept encountering the error… When the burn process is complete, eject the DVD, add a label, and store the DVD in a safe location. Place a blank DVD into the Macs optical drive, then select Burn to create a bootable DVD containing OS X Mountain Lion. The first one (maybe eighteen months old) went through without a hitch but the second one (which is a few years old) had all manner of problems including reading my original DVD-RW that I had burnt using the DMG file from the Mac App Store. Select the InstallESD.dmg file you copied to the Desktop. I had a couple of MacBook Pro laptops grace my desk and I have been upgrading them to Mac OS X 10.7 (Lion).