This is my experience with updating from LS3 to LS4 on a High Sierra MacBook Pro. I am seeking advice.
I have been using LS for quite a few years now.
I think I was using the latest LS, as I always let it update when it asks permission to do so.
Incidentally, last time I updated to LS4 and during installation, I realized it was not a free update.
I did not intervene with the installation, let it complete, then let LS4 restart the Macbook.
Macbook chimed, the white screen appeared with the progress bar in the middle. A very slow progress bar. Very-very slow. It did not reach the end of the bar for several _minutes_ (!). After around 5-10 minutes I pressed the power button to shut down the Macbook.
Started again, and pressed the SHIFT key. Macbook chimed, the white screen appeared with the progress bar in the middle. A very slow progress bar. It completed, however, and the login screen came up in 'safe mode' or whatever it was written in red.
So I downloaded the last version of LS3 from the obdev site and installed it over the LS4.
The MacBook - still very slowly - restarted and fully booted after the install.
I happily (NOT!) worked with it for a week or so (I am not sure, an automatic system update may have been performed one night), then decided to restart this morning.
Remember, I reverted back to the latest version of LS3.
Macbook chimed, the white screen appeared with the progress bar in the middle. A very slow progress bar. Very-very slow. It did not reach the end of the bar for several _minutes_ (!), again. When it finally filled the progress bar space (whatever it is called), it has been about 20 minutes already, and then nothing happened (visually) for more than 5 minutes. No login screen just the white screen with the completed progress bar.
So I pressed the power button to shut down the MacBook.
Started again, with the SHIFT key, watched the boot bar slowly fill, logged in, downloaded LS3 installer, run the uninstaller (kept the rules in Library), let it restart the MacBook, and the computer booted under a minute to the login screen.
So, now I do not use LS. 'Is it safe?'
Please assist in deciding:
Should I try installing the latest LS 3 again? I see no reason to abandon LS3 if it works and lets other parts of the system work, so I do not plan to install and pay for LS4.
I guess LS3 was not letting the system boot properly because it may have some entanglements with remnants of the LS4 installation.