![]() But variations of it have been posted on this website thousands of times over a period of years. You may not be able to understand the script yourself. Unlike an application that you download and click to run, it's transparent, so anyone with the requisite skill can verify what it does. In this case, however, there are ways for you to decide whether the program is safe without having to trust me. In general, no, it's not safe and I don't encourage it. You should be wondering whether you can believe me, and whether it's safe to run a program at the behest of a stranger. If you prefer, you can act on it yourself without disclosing the contents to me or anyone else. That report goes nowhere unless you choose to share it. All it does is to generate a human-readable report on the state of the computer. It doesn't send or receive any data on the network. Below are instructions to run a UNIX shell script, a type of program. There are ways to back up a computer that isn't fully functional. Backup is always a must, and when you're having any kind of trouble with the computer, you may be at higher than usual risk of losing data, whether you follow these instructions or not. The backup is necessary on general principle, not because of anything in the test procedure. If you don't already have a current backup, back up all data before doing anything else. You do harder tasks with the computer all the time.Ģ. The process is much less complicated than the description. It will do no harm, but it won't do much good either.ĭon't be put off by the complexity of these instructions. I don't recommend running it on older versions of OS X. The test works on OS X 10.7 ("Lion") and later. But with the aid of the test results, the solution may take a few minutes, instead of hours or days. It changes nothing, for better or worse, and therefore will not, in itself, solve the problem. Getting a bit frustrated and not willing to upgrade the other Macs to this OS.seems to unstable yet!!!ġ. I have again for the 4th time had to recover the computer to Yosemite from a time machine backup.an 8 hour process each time. I have tried reinstalling a new version of El Capitan via the recovery screen.again it loads, installs and works UNTIL the dreaded restart.then the white screen.and NOTHING. The computer will not boot into safe mode. HOWEVER.on trying a RESTART the system will not restart in El Capitan.the Apple logo appears and the timeline under the logo stays empty.the white screen just stays there. The system runs allowing use of Mail, Safari and other programs.even allowing the system to be put to sleep and waking again. Using an iMac 2011 running Yosemite.all upgrades done as they appear with no problems ever.Įl Capitan installs correctly showing the login screen and asking for the iCloud password.
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