This question already has an answer here:
Trying to apply this patch to a 184.108.40.206 site and getting errors. Have already managed this with other Magento versions, a few errors but nothing I can't fix.
Getting these errors:
patching file app/etc/modules/Mage_All.xml Hunk #1 FAILED at 275. Hunk #2 FAILED at 397. 2 out of 2 hunks FAILED -- saving rejects to file app/etc/modules/Mage_All.xml.rej
I've checked this file and it is identical to what the patch is expecting
patching file skin/adminhtml/default/default/media/uploader.swf Reversed (or previously applied) patch detected! Assume -R? [n] Apply anyway? [n] Skipping patch. 1 out of 1 hunk ignored -- saving rejects to file skin/adminhtml/default/default/media/uploader.swf.rej patching file skin/adminhtml/default/default/media/uploaderSingle.swf Reversed (or previously applied) patch detected! Assume -R? [n] Apply anyway? [n] Skipping patch. 1 out of 1 hunk ignored -- saving rejects to file skin/adminhtml/default/default/media/uploaderSingle.swf.rej
This post (Magento Patch SUPEE 8788 - 220.127.116.11 - uploaderSingle.swf) suggesting zipping and unzipping the patch file, but this had no effect for me.