# I just built a Sage system. What files may I delete with impunity?

I have just built Sage 7.6 on an Apple iMac 8,1 running OS X version 10.11.6. I started with a download of a compressed source distribution from the Sage github repository (without cloning the repository itself, since I don't plan to contribute any development ideas or comments for awhile). Doctesting went very well, with only two failed tests out of the entire suite:

```
sage -t src/sage/doctest/test.py # 1 doctest failed
sage -t src/sage/modules/vector_rational_dense.pyx # 1 doctest failed
```

I also downloaded the equivalent binary distribution and doctested that, obtaining these results:

```
sage -t src/sage/calculus/calculus.py # 1 doctest failed
sage -t src/sage/doctest/test.py # 1 doctest failed
sage -t src/sage/graphs/digraph_generators.py # 3 doctests failed
sage -t src/sage/graphs/graph_generators.py # 5 doctests failed
sage -t src/sage/graphs/hypergraph_generators.py # 7 doctests failed
sage -t src/sage/modules/vector_rational_dense.pyx # 1 doctest failed
sage -t src/sage/tests/cmdline.py # Timed out after testing finished
```

I did expect my own build to do better, but the installation I ended up with is fully 2 GB larger than what came in the binary distribution. Much (more than 1/3) of the overage is in a directory

```
../sage-7.6/local/share/doc/sage/doctrees
```

which is not present in the binary distribution, and I assume it is only of interest to developers. Is that correct? I will trim my build by also removing two large files

```
../sage-7.6/src/build/temp.macosx.10.9...
../sage-7.6/src/build/lib.macosx.10.9...
```

but keep my log and upstream files in case I want to review the build or look at the sources. All this is pending any further advice I get in the next few days about files that are generally only of interest to developers.

Why version 7.6? That's pretty old. Did more recent versions fail for you?

Thanks for your replies! I see that in the binary downloads there is an 8.6 release that is listed for my system, Mac OS X 10.11. That would give me the benefit of subsequent bug fixes.

I must agree that sage-7.6 is an old release, but my hardware is much, much older! I will give it a try on the 8.6 build after I begin to learn something substantive about using Sage -- intro linear algebra is my current study. I will certainly report back, here, if I experience problems beyond doc testing.

I'm inclined immediately to accept your answer, given below. Am I the only one who can do that?